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  • 1. Aaboud, M.
    et al.
    Asimakopoulou, Eleni M.
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, High Energy Physics.
    Bergeås Kuutmann, Elin
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, High Energy Physics.
    Bokan, Petar
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, High Energy Physics.
    Brenner, Richard
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, High Energy Physics.
    Ekelöf, Tord
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, High Energy Physics.
    Ellajosyula, Venugopal
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, High Energy Physics.
    Ellert, Mattias
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, High Energy Physics.
    Ferrari, Arnaud
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, High Energy Physics.
    Gradin, P. O. Joakim
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, High Energy Physics.
    Isacson, Max
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, High Energy Physics.
    Mårtensson, Mikael
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, High Energy Physics.
    Sales De Bruin, Pedro
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, High Energy Physics.
    Zwalinski, L.
    Dijet azimuthal correlations and conditional yields in pp and p+Pb collisions at √sNN=5.02TeV with the ATLAS detector2019In: Physical Review C: Covering Nuclear Physics, ISSN 2469-9985, E-ISSN 2469-9993, Vol. 100, no 3, article id 034903Article in journal (Refereed)
    Abstract [en]

    This paper presents a measurement of forward-forward and forward-central dijet azimuthal angular correlations and conditional yields in proton-proton (pp) and proton-lead (p + Pb) collisions as a probe of the nuclear gluon density in regions where the fraction of the average momentum per nucleon carried by the parton entering the hard scattering is low. In these regions, gluon saturation can modify the rapidly increasing parton distribution function of the gluon. The analysis utilizes 25 pb(-1) of pp data and 360 mu b(-1) of p + Pb data, both at root S-NN = 5.02 TeV, collected in 2015 and 2016, respectively, with the ATLAS detector at the Large Hadron Collider. The measurement is performed in the center-of-mass frame of the nucleon-nucleon system in the rapidity range between -4.0 and 4.0 using the two highest transverse-momentum jets in each event, with the highest transverse-momentum jet restricted to the forward rapidity range. No significant broadening of azimuthal angular correlations is observed for forward-forward or forward-central dijets in p + Pb compared to pp collisions. For forward-forward jet pairs in the proton-going direction, the ratio of conditional yields in p + Pb collisions to those in pp collisions is suppressed by approximately 20%, with no significant dependence on the transverse momentum of the dijet system. No modification of conditional yields is observed for forward-central dijets.

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  • 2. Aaboud, M.
    et al.
    Asimakopoulou, Eleni M.
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, High Energy Physics.
    Bergeås Kuutmann, Elin
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, High Energy Physics.
    Bokan, Petar
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, High Energy Physics.
    Brenner, Richard
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, High Energy Physics.
    Ekelöf, Tord
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, High Energy Physics.
    Ellert, Mattias
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, High Energy Physics.
    Ferrari, Arnaud
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, High Energy Physics.
    Gradin, P. O. Joakim
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, High Energy Physics.
    Isacson, Max F.
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, High Energy Physics.
    Mårtensson, Mikael U. F.
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, High Energy Physics.
    Sales De Bruin, Pedro
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, High Energy Physics.
    Zwalinski, L.
    Measurement of the suppression and azimuthal anisotropy of muons from heavy-flavor decays in Pb plus Pb collisions at root s(NN)=2.76 TeV with the ATLAS detector2018In: Physical Review C: Covering Nuclear Physics, ISSN 2469-9985, E-ISSN 2469-9993, Vol. 98, no 4, article id 044905Article in journal (Refereed)
    Abstract [en]

    ATLAS measurements of the production of muons from heavy-flavor decays in root s(NN) = 2.76 TeV Pb+Pb collisions and root s = 2.76 TeV pp collisions at the LHC are presented. Integrated luminosities of 0.14 nb(-1) and 570 nb(-1) are used for the Pb+Pb and pp measurements, respectively, which are performed over the muon transverse momentum range 4 < pT < 14 GeV and for five Pb+Pb centrality intervals. Backgrounds arising from in-flight pion and kaon decays, hadronic showers, and misreconstructed muons are statistically removed using a template-fitting procedure. The heavy-flavor muon differential cross sections and per-event yields are measured in pp and Pb+Pb collisions, respectively. The nuclear modification factor R-AA obtained from these is observed to be independent of pT, within uncertainties, and to be less than unity, which indicates suppressed production of heavy-flavor muons in Pb+Pb collisions. For the 10% most central Pb+Pb events, the measured R-AA is approximately 0.35. The azimuthal modulation of the heavy-flavor muon yields is also measured and the associated Fourier coefficients v(n) for n = 2, 3, and 4 are given as a function of pT and centrality. They vary slowly with pT and show a systematic variation with centrality which is characteristic of other anisotropy measurements, such as that observed for inclusive hadrons. The measured R-AA and v(n) values are also compared with theoretical calculations.

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    fulltext
  • 3. Aaboud, M.
    et al.
    Asimakopoulou, Eleni M.
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, High Energy Physics.
    Bergeås Kuutmann, Elin
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, High Energy Physics.
    Bokan, Petar
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, High Energy Physics.
    Brenner, Richard
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, High Energy Physics.
    Ekelöf, Tord
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, High Energy Physics.
    Ellert, Mattias
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, High Energy Physics.
    Ferrari, Arnaud
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, High Energy Physics.
    Gradin, P. O. Joakim
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, High Energy Physics.
    Isacson, Max
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, High Energy Physics.
    Mårtensson, Mikael
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, High Energy Physics.
    Sales De Bruin, Pedro
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, High Energy Physics.
    Zwalinski, L.
    Measurement of jet fragmentation in Pb plus Pb and pp collisions at root S-NN=5.02 TeV with the ATLAS detector2018In: Physical Review C: Covering Nuclear Physics, ISSN 2469-9985, E-ISSN 2469-9993, Vol. 98, no 2, article id 024908Article in journal (Refereed)
    Abstract [en]

    This paper presents a measurement of jet fragmentation functions in 0.49 nb(-1) of Pb +Pb collisions and 25 pb(-1) of pp collisions at root S-NN = 5.02 TeV collected in 2015 with the ATLAS detector at the LHC. These measurements provide insight into the jet quenching process in the quark-gluon plasma created in the aftermath of ultrarelativistic collisions between two nuclei. The modifications to the jet fragmentation functions are quantified by dividing the measurements in Pb+Pb collisions by baseline measurements in pp collisions. This ratio is studied as a function of the transverse momentum of the jet, the jet rapidity, and the centrality of the collision. In both collision systems, the jet fragmentation functions are measured for jets with transverse momentum between 126 and 398 GeV and with an absolute value of jet rapidity less than 2.1. An enhancement of particles carrying a small fraction of the jet momentum is observed, which increases with centrality and with increasing jet transverse momentum. Yields of particles carrying a very large fraction of the jet momentum are also observed to be enhanced. Between these two enhancements of the fragmentation functions a suppression of particles carrying an intermediate fraction of the jet momentum is observed in Pb+Pb collisions. A small dependence of the modifications on jet rapidity is observed.

    Download full text (pdf)
    fulltext
  • 4. Aaboud, M.
    et al.
    Bergeås, Elin Kuutmann
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, High Energy Physics.
    Brenner, Richard
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, High Energy Physics.
    Ekelöf, Tord
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, High Energy Physics.
    Ellert, Mattias
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, High Energy Physics.
    Ferrari, Arnaud
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, High Energy Physics.
    Gradin, P.O. Joakim
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, High Energy Physics.
    Madsen, Alexander
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, High Energy Physics.
    Öhman, Henrik
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, High Energy Physics.
    Rangel-Smith, Camilla
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, High Energy Physics.
    Zwalinski, L.
    Measurements of long-range azimuthal anisotropies and associated Fourier coefficients for pp collisions at root s=5.02 and 13 TeV and p plus Pb collisions at root(NN)-N-s=5.02 TeV with the ATLAS detector2017In: Physical Review C: Covering Nuclear Physics, ISSN 2469-9985, E-ISSN 2469-9993, Vol. 96, no 2, article id 024908Article in journal (Refereed)
    Abstract [en]

    ATLAS measurements of two-particle correlations are presented for root s = 5.02 and 13 TeV pp collisions and for root(NN)-N-s = 5.02 TeV p + Pb collisions at the LHC. The correlation functions are measured as a function of relative azimuthal angle Delta phi, and pseudorapidity separation Delta eta, using charged particles detected within the pseudorapidity interval |eta| < 2.5. Azimuthal modulation in the long-range component of the correlation function, with | Delta eta| > 2, is studied using a template fitting procedure to remove a "back-to-back" contribution to the correlation function that primarily arises from hard-scattering processes. In addition to the elliptic, cos(2 Delta phi), modulation observed in a previous measurement, the pp correlation functions exhibit significant cos(3 Delta phi) and cos(4 Lambda phi) modulation. The Fourier coefficients v(n),(n) associated with the cos (n Lambda phi) modulation of the correlation functions for n = 2-4 are measured as a function of charged-particle multiplicity and charged-particle transverse momentum. The Fourier coefficients are observed to be compatible with cos(n phi) modulation of per-event singleparticle azimuthal angle distributions. The single-particle Fourier coefficients vn are measured as a function of charged-particle multiplicity, and charged-particle transverse momentum for n = 2-4. The integrated luminosities used in this analysis are, 64 nb(-1) for the root s = 13 TeV pp data, 170 nb(-1) for the root s = 5.02 TeV pp data, and 28 nb(-1) for the root(NN)-N-s = 5.02 TeV p + Pb data.

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    fulltext
  • 5. Aaboud, M.
    et al.
    Bergeås Kuutmann, Elin
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, High Energy Physics.
    Bokan, Peter
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, High Energy Physics.
    Brenner, Richard
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, High Energy Physics.
    Ekelöf, Tord
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, High Energy Physics.
    Ellert, Mattias
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, High Energy Physics.
    Ferrari, Arnaud
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, High Energy Physics.
    Gradin, P.O. Joakim
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, High Energy Physics.
    Madsen, Alexander
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, High Energy Physics.
    Öhman, Henrik
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, High Energy Physics.
    Rangel-Smith, Camilla
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, High Energy Physics.
    De Bruin, Pedro Sales
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, High Energy Physics.
    Zwalinski, L.
    Femtoscopy with identified charged pions in proton-lead collisions at root s(NN)=5.02 TeV with ATLAS2017In: Physical Review C: Covering Nuclear Physics, ISSN 2469-9985, E-ISSN 2469-9993, Vol. 96, no 6, article id 064908Article in journal (Refereed)
    Abstract [en]

    Bose-Einstein correlations between identified charged pions are measured for p+Pb collisions at root s(NN) = 5.02 TeV using data recorded by the ATLAS detector at the CERN Large Hadron Collider corresponding to a total integrated luminosity of 28 nb(-1). Pions are identified using ionization energy loss measured in the pixel detector. Two-particle correlation functions and the extracted source radii are presented as a function of collision centrality as well as the average transverse momentum (k(T)) and rapidity (y*(pi pi)) of the pair. Pairs are selected with a rapidity -2 < y*(pi pi) < 1 and with an average transverse momentum 0.1 < k(T) < 0.8 GeV. The effect of jet fragmentation on the two-particle correlation function is studied, and a method using opposite-charge pair data to constrain its contributions to the measured correlations is described. The measured source sizes are substantially larger in more central collisions and are observed to decrease with increasing pair k(T). A correlation of the radii with the local charged-particle density is demonstrated. The scaling of the extracted radii with the mean number of participating nucleons is also used to compare a selection of initial-geometry models. The cross term R-ol is measured as a function of rapidity, and a nonzero value is observed with 5.1 sigma combined significance for -1 < y*pi pi < 1 in the most central events.

    Download full text (pdf)
    fulltext
  • 6. Aaboud, M.
    et al.
    Jensen, Bengt
    KTH, School of Engineering Sciences (SCI), Physics, Particle and Astroparticle Physics.
    Ohm, Christian
    KTH, School of Engineering Sciences (SCI), Physics, Particle and Astroparticle Physics.
    Ripellino, Giulia
    KTH, School of Engineering Sciences (SCI), Physics, Particle and Astroparticle Physics.
    Sidebo, P. Edvin
    KTH, School of Engineering Sciences (SCI), Physics, Particle and Astroparticle Physics.
    Strandberg, Jonas
    KTH, School of Engineering Sciences (SCI), Physics, Particle and Astroparticle Physics.
    Zwalinski, L.
    CERN, Geneva, Switzerland..
    Dijet azimuthal correlations and conditional yields in pp and p plus Pb collisions ats root S-NN=5.02 TeV with the ATLAS detector2019In: Physical Review C: Covering Nuclear Physics, ISSN 2469-9985, E-ISSN 2469-9993, Vol. 100, no 3, article id 034903Article in journal (Refereed)
    Abstract [en]

    This paper presents a measurement of forward-forward and forward-central dijet azimuthal angular correlations and conditional yields in proton-proton (pp) and proton-lead (p + Pb) collisions as a probe of the nuclear gluon density in regions where the fraction of the average momentum per nucleon carried by the parton entering the hard scattering is low. In these regions, gluon saturation can modify the rapidly increasing parton distribution function of the gluon. The analysis utilizes 25 pb(-1) of pp data and 360 mu b(-1) of p + Pb data, both at root S-NN = 5.02 TeV, collected in 2015 and 2016, respectively, with the ATLAS detector at the Large Hadron Collider. The measurement is performed in the center-of-mass frame of the nucleon-nucleon system in the rapidity range between -4.0 and 4.0 using the two highest transverse-momentum jets in each event, with the highest transverse-momentum jet restricted to the forward rapidity range. No significant broadening of azimuthal angular correlations is observed for forward-forward or forward-central dijets in p + Pb compared to pp collisions. For forward-forward jet pairs in the proton-going direction, the ratio of conditional yields in p + Pb collisions to those in pp collisions is suppressed by approximately 20%, with no significant dependence on the transverse momentum of the dijet system. No modification of conditional yields is observed for forward-central dijets.

  • 7.
    Aaboud, M.
    et al.
    Univ Mohamed Premier, Fac Sci, Oujda, Morocco.;LPTPM, Oujda, Morocco..
    Kastanas, Konstatinos A.
    KTH, School of Engineering Sciences (SCI), Physics, Particle and Astroparticle Physics.
    Lund-Jensen, Bengt
    KTH, School of Engineering Sciences (SCI), Physics, Particle and Astroparticle Physics.
    Ohm, Christian
    KTH, School of Engineering Sciences (SCI), Physics, Particle and Astroparticle Physics.
    Ripellino, Giulia
    KTH, School of Engineering Sciences (SCI), Physics, Particle and Astroparticle Physics.
    Sidebo, Edvin
    KTH, School of Engineering Sciences (SCI), Physics, Particle and Astroparticle Physics.
    Strandberg, Jonas
    KTH, School of Engineering Sciences (SCI), Physics, Particle and Astroparticle Physics.
    Zwalinski, L.
    CERN, Geneva, Switzerland..
    et al,
    Measurement of the suppression and azimuthal anisotropy of muons from heavy-flavor decays in Pb plus Pb collisions at root s(NN)=2.76 TeV with the ATLAS detector2018In: Physical Review C: Covering Nuclear Physics, ISSN 2469-9985, E-ISSN 2469-9993, Vol. 98, no 4, article id 044905Article in journal (Refereed)
    Abstract [en]

    ATLAS measurements of the production of muons from heavy-flavor decays in root s(NN) = 2.76 TeV Pb+Pb collisions and root s = 2.76 TeV pp collisions at the LHC are presented. Integrated luminosities of 0.14 nb(-1) and 570 nb(-1) are used for the Pb+Pb and pp measurements, respectively, which are performed over the muon transverse momentum range 4 < pT < 14 GeV and for five Pb+Pb centrality intervals. Backgrounds arising from in-flight pion and kaon decays, hadronic showers, and misreconstructed muons are statistically removed using a template-fitting procedure. The heavy-flavor muon differential cross sections and per-event yields are measured in pp and Pb+Pb collisions, respectively. The nuclear modification factor R-AA obtained from these is observed to be independent of pT, within uncertainties, and to be less than unity, which indicates suppressed production of heavy-flavor muons in Pb+Pb collisions. For the 10% most central Pb+Pb events, the measured R-AA is approximately 0.35. The azimuthal modulation of the heavy-flavor muon yields is also measured and the associated Fourier coefficients v(n) for n = 2, 3, and 4 are given as a function of pT and centrality. They vary slowly with pT and show a systematic variation with centrality which is characteristic of other anisotropy measurements, such as that observed for inclusive hadrons. The measured R-AA and v(n) values are also compared with theoretical calculations.

  • 8. Aaboud, M.
    et al.
    Kastanas, Konstatinos A.
    KTH, School of Engineering Sciences (SCI), Physics, Particle and Astroparticle Physics.
    Lund-Jensen, Bengt
    KTH, School of Engineering Sciences (SCI), Physics, Particle and Astroparticle Physics.
    Ohm, Christian
    KTH, School of Engineering Sciences (SCI), Physics, Particle and Astroparticle Physics.
    Ripellino, Giulia
    KTH, School of Engineering Sciences (SCI), Physics, Particle and Astroparticle Physics.
    Sidebo, P. Edvin
    KTH, School of Engineering Sciences (SCI), Physics, Particle and Astroparticle Physics.
    Strandberg, Jonas
    KTH, School of Engineering Sciences (SCI), Physics, Particle and Astroparticle Physics.
    Zwalinski, L.
    et al.,
    Measurement of jet fragmentation in Pb plus Pb and pp collisions at root S-NN=5.02 TeV with the ATLAS detector2018In: Physical Review C: Covering Nuclear Physics, ISSN 2469-9985, E-ISSN 2469-9993, Vol. 98, no 2, article id 024908Article in journal (Refereed)
    Abstract [en]

    This paper presents a measurement of jet fragmentation functions in 0.49 nb(-1) of Pb +Pb collisions and 25 pb(-1) of pp collisions at root S-NN = 5.02 TeV collected in 2015 with the ATLAS detector at the LHC. These measurements provide insight into the jet quenching process in the quark-gluon plasma created in the aftermath of ultrarelativistic collisions between two nuclei. The modifications to the jet fragmentation functions are quantified by dividing the measurements in Pb+Pb collisions by baseline measurements in pp collisions. This ratio is studied as a function of the transverse momentum of the jet, the jet rapidity, and the centrality of the collision. In both collision systems, the jet fragmentation functions are measured for jets with transverse momentum between 126 and 398 GeV and with an absolute value of jet rapidity less than 2.1. An enhancement of particles carrying a small fraction of the jet momentum is observed, which increases with centrality and with increasing jet transverse momentum. Yields of particles carrying a very large fraction of the jet momentum are also observed to be enhanced. Between these two enhancements of the fragmentation functions a suppression of particles carrying an intermediate fraction of the jet momentum is observed in Pb+Pb collisions. A small dependence of the modifications on jet rapidity is observed.

  • 9. Aaboud, M.
    et al.
    Lund-Jensen, Bengt
    KTH, School of Engineering Sciences (SCI), Physics, Particle and Astroparticle Physics.
    Sidebo, P. Edvin
    KTH, School of Engineering Sciences (SCI), Physics, Particle and Astroparticle Physics.
    Strandberg, Jonas
    KTH, School of Engineering Sciences (SCI), Physics, Particle and Astroparticle Physics.
    Zwalinski, L.
    et al.,
    Femtoscopy with identified charged pions in proton-lead collisions at root s(NN)=5.02 TeV with ATLAS2017In: Physical Review C: Covering Nuclear Physics, ISSN 2469-9985, E-ISSN 2469-9993, Vol. 96, no 6Article in journal (Refereed)
    Abstract [en]

    Bose-Einstein correlations between identified charged pions are measured for p+Pb collisions at root s(NN) = 5.02 TeV using data recorded by the ATLAS detector at the CERN Large Hadron Collider corresponding to a total integrated luminosity of 28 nb(-1). Pions are identified using ionization energy loss measured in the pixel detector. Two-particle correlation functions and the extracted source radii are presented as a function of collision centrality as well as the average transverse momentum (k(T)) and rapidity (y*(pi pi)) of the pair. Pairs are selected with a rapidity -2 < y*(pi pi) < 1 and with an average transverse momentum 0.1 < k(T) < 0.8 GeV. The effect of jet fragmentation on the two-particle correlation function is studied, and a method using opposite-charge pair data to constrain its contributions to the measured correlations is described. The measured source sizes are substantially larger in more central collisions and are observed to decrease with increasing pair k(T). A correlation of the radii with the local charged-particle density is demonstrated. The scaling of the extracted radii with the mean number of participating nucleons is also used to compare a selection of initial-geometry models. The cross term R-ol is measured as a function of rapidity, and a nonzero value is observed with 5.1 sigma combined significance for -1 < y*pi pi < 1 in the most central events.

  • 10.
    Aad, G.
    et al.
    Aix Marseille Univ, IN2P3, CNRS, CPPM, Marseille, France.
    Asimakopoulou, Eleni M.
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, High Energy Physics.
    Bergeås Kuutmann, Elin
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, High Energy Physics.
    Bokan, Petar
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, High Energy Physics.
    Brenner, Richard
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, High Energy Physics.
    Ekelöf, Tord
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, High Energy Physics.
    Ellajosyula, Venugopal
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, High Energy Physics.
    Ellert, Mattias
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, High Energy Physics.
    Ferrari, Arnaud
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, High Energy Physics.
    Ferrari, Arnaud
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, High Energy Physics.
    Mårtensson, Mikael U.F.
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, High Energy Physics.
    Sales De Bruin, Pedro
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, High Energy Physics.
    Zwalinski, L.
    CERN, Geneva, Switzerland.
    Measurement of angular and momentum distributions of charged particles within and around jets in Pb plus Pb and pp collisions at root s(NN)=5.02 TeV with the ATLAS detector2019In: Physical Review C: Covering Nuclear Physics, ISSN 2469-9985, E-ISSN 2469-9993, Vol. 100, no 6, article id 064901Article in journal (Refereed)
    Abstract [en]

    Studies of the fragmentation of jets into charged particles in heavy-ion collisions can provide information about the mechanism of jet quenching by the hot and dense QCD matter created in such collisions, the quark-gluon plasma. This paper presents a measurement of the angular distribution of charged particles around the jet axis in root s(NN) = 5.02 TeV Pb + Pb and pp collisions, using the ATLAS detector at the LHC. The Pb + Pb and pp data sets have integrated luminosities of 0.49 nb(-1) and 25 pb(-1), respectively. The measurement is performed for jets reconstructed with the anti-k(t) algorithm with radius parameter R = 0.4 and is extended to an angular distance of r = 0.8 from the jet axis. Results are presented as a function of Pb + Pb collision centrality and distance from the jet axis for charged particles with transverse momenta in the 1- to 63-GeV range, matched to jets with transverse momenta in the 126- to 316-GeV range and an absolute value of jet rapidity of less than 1.7. Modifications to the measured distributions are quantified by taking a ratio to the measurements in pp collisions. Yields of charged particles with transverse momenta below 4 GeV are observed to be increasingly enhanced as a function of angular distance from the jet axis, reaching a maximum at r = 0.6. Charged particles with transverse momenta above 4 GeV have an enhanced yield in Pb + Pb collisions in the jet core for angular distances up to r = 0.05 from the jet axis, with a suppression at larger distances.

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    FULLTEXT01
  • 11. Aad, G.
    et al.
    Asimakopoulou, Eleni M.
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, High Energy Physics.
    Bergeås Kuutmann, Elin
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, High Energy Physics.
    Brenner, Richard
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, High Energy Physics.
    Ekelöf, Tord
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, High Energy Physics.
    Ellajosyula, Venugopal
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, High Energy Physics.
    Ellert, Mattias
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, High Energy Physics.
    Ferrari, Arnaud
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, High Energy Physics.
    Isacson, Max
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, High Energy Physics.
    Mårtensson, Mikael U. F.
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, High Energy Physics.
    Zwalinski, L.
    Measurement of the azimuthal anisotropy of charged-particle production in Xe plus Xe collisions at root S-NN=5.44 TeV with the ATLAS detector2020In: Physical Review C: Covering Nuclear Physics, ISSN 2469-9985, E-ISSN 2469-9993, Vol. 101, no 2, article id 024906Article in journal (Refereed)
    Abstract [en]

    This paper describes the measurements of flow harmonics v(2)-v(6) in 3 mu b(-1) of Xe Xe collisions at root S-NN = 5.44 TeV performed using the ATLAS detector at the Large Hadron Collider (LHC). Measurements of the centrality, multiplicity, and p(T) dependence of the v(n) obtained using two-particle correlations and the scalar product technique are presented. The measurements are also performed using a template-fit procedure, which was developed to remove nonflow correlations in small collision systems. This nonflow removal is shown to have a significant influence on the measured v(n) at high p(T), especially in peripheral events. Comparisons of the measured v(n) with measurements in Pb + Pb collisions and p + Pb collisions at root S-NN = 5.02 TeV are also presented. The v(n) values in Xe + Xe collisions are observed to be larger than those in Pb + Pb collisions for n = 2, 3, and 4 in the most central events. However, with decreasing centrality or increasing harmonic order n, the v(n) values in Xe + Xe collisions become smaller than those in Pb + Pb collisions. The v(n) in Xe + Xe and Pb + Pb collisions are also compared as a function of the mean number of participating nucleons, < N-part >, and the measured charged-particle multiplicity in the detector. The v(3) values in Xe + Xe and Pb + Pb collisions are observed to be similar at the same < N-part > or multiplicity, but the other harmonics are significantly different. The ratios of the measured v(n) in Xe + Xe and Pb + Pb collisions, as a function of centrality, are also compared to theoretical calculations.

    Download full text (pdf)
    FULLTEXT01
  • 12.
    Aad, G.
    et al.
    Aix Marseille Univ, IN2P3, CNRS, CPPM, Marseille, France..
    Jensen, Bengt
    KTH, School of Engineering Sciences (SCI), Physics, Particle and Astroparticle Physics.
    Ohm, Christian
    KTH, School of Engineering Sciences (SCI), Physics, Particle and Astroparticle Physics.
    Ripellino, Giulia
    KTH, School of Engineering Sciences (SCI), Physics, Particle and Astroparticle Physics.
    Sidebo, P. Edvin
    KTH, School of Engineering Sciences (SCI), Physics, Particle and Astroparticle Physics.
    Strandberg, Jonas
    KTH, School of Engineering Sciences (SCI), Physics, Particle and Astroparticle Physics.
    Zwalinski, L.
    CERN, Geneva, Switzerland..
    et al.,
    Measurement of angular and momentum distributions of charged particles within and around jets in Pb plus Pb and pp collisions at root s(NN)=5.02 TeV with the ATLAS detector2019In: Physical Review C: Covering Nuclear Physics, ISSN 2469-9985, E-ISSN 2469-9993, Vol. 100, no 6, article id 064901Article in journal (Refereed)
    Abstract [en]

    Studies of the fragmentation of jets into charged particles in heavy-ion collisions can provide information about the mechanism of jet quenching by the hot and dense QCD matter created in such collisions, the quark-gluon plasma. This paper presents a measurement of the angular distribution of charged particles around the jet axis in root s(NN) = 5.02 TeV Pb + Pb and pp collisions, using the ATLAS detector at the LHC. The Pb + Pb and pp data sets have integrated luminosities of 0.49 nb(-1) and 25 pb(-1), respectively. The measurement is performed for jets reconstructed with the anti-k(t) algorithm with radius parameter R = 0.4 and is extended to an angular distance of r = 0.8 from the jet axis. Results are presented as a function of Pb + Pb collision centrality and distance from the jet axis for charged particles with transverse momenta in the 1- to 63-GeV range, matched to jets with transverse momenta in the 126- to 316-GeV range and an absolute value of jet rapidity of less than 1.7. Modifications to the measured distributions are quantified by taking a ratio to the measurements in pp collisions. Yields of charged particles with transverse momenta below 4 GeV are observed to be increasingly enhanced as a function of angular distance from the jet axis, reaching a maximum at r = 0.6. Charged particles with transverse momenta above 4 GeV have an enhanced yield in Pb + Pb collisions in the jet core for angular distances up to r = 0.05 from the jet axis, with a suppression at larger distances.

  • 13.
    Aad, G.
    et al.
    Aix Marseille Univ, IN2P3, CNRS, CPPM, Marseille, France..
    Lund-Jensen, Bengt
    KTH, School of Engineering Sciences (SCI), Physics, Particle and Astroparticle Physics.
    Ohm, Christian
    KTH, School of Engineering Sciences (SCI), Physics, Particle and Astroparticle Physics.
    Ripellino, Giulia
    KTH, School of Engineering Sciences (SCI), Physics, Particle and Astroparticle Physics.
    Sidebo, P. Edvin
    KTH, School of Engineering Sciences (SCI), Physics, Particle and Astroparticle Physics.
    Strandberg, Jonas
    KTH, School of Engineering Sciences (SCI), Physics, Particle and Astroparticle Physics.
    Zwalinski, L.
    CERN, Geneva, Switzerland..
    et al.,
    Measurement of the azimuthal anisotropy of charged-particle production in Xe plus Xe collisions at root S-NN=5.44 TeV with the ATLAS detector2020In: Physical Review C: Covering Nuclear Physics, ISSN 2469-9985, E-ISSN 2469-9993, Vol. 101, no 2, article id 024906Article in journal (Refereed)
    Abstract [en]

    This paper describes the measurements of flow harmonics v(2)-v(6) in 3 mu b(-1) of Xe Xe collisions at root S-NN = 5.44 TeV performed using the ATLAS detector at the Large Hadron Collider (LHC). Measurements of the centrality, multiplicity, and p(T) dependence of the v(n) obtained using two-particle correlations and the scalar product technique are presented. The measurements are also performed using a template-fit procedure, which was developed to remove nonflow correlations in small collision systems. This nonflow removal is shown to have a significant influence on the measured v(n) at high p(T), especially in peripheral events. Comparisons of the measured v(n) with measurements in Pb + Pb collisions and p + Pb collisions at root S-NN = 5.02 TeV are also presented. The v(n) values in Xe + Xe collisions are observed to be larger than those in Pb + Pb collisions for n = 2, 3, and 4 in the most central events. However, with decreasing centrality or increasing harmonic order n, the v(n) values in Xe + Xe collisions become smaller than those in Pb + Pb collisions. The v(n) in Xe + Xe and Pb + Pb collisions are also compared as a function of the mean number of participating nucleons, < N-part >, and the measured charged-particle multiplicity in the detector. The v(3) values in Xe + Xe and Pb + Pb collisions are observed to be similar at the same < N-part > or multiplicity, but the other harmonics are significantly different. The ratios of the measured v(n) in Xe + Xe and Pb + Pb collisions, as a function of centrality, are also compared to theoretical calculations.

  • 14.
    Abulaiti, Yiming
    et al.
    Stockholm University, Faculty of Science, Department of Physics. Stockholm University, Faculty of Science, The Oskar Klein Centre for Cosmo Particle Physics (OKC).
    Åkerstedt, Henrik
    Stockholm University, Faculty of Science, Department of Physics. Stockholm University, Faculty of Science, The Oskar Klein Centre for Cosmo Particle Physics (OKC).
    Bertoli, Gabriele
    Stockholm University, Faculty of Science, Department of Physics. Stockholm University, Faculty of Science, The Oskar Klein Centre for Cosmo Particle Physics (OKC).
    Bessidskaia Bylund, Olga
    Stockholm University, Faculty of Science, Department of Physics. Stockholm University, Faculty of Science, The Oskar Klein Centre for Cosmo Particle Physics (OKC).
    Bohm, Christian
    Stockholm University, Faculty of Science, Department of Physics.
    Carney, Rebecca M. D.
    Stockholm University, Faculty of Science, Department of Physics. Stockholm University, Faculty of Science, The Oskar Klein Centre for Cosmo Particle Physics (OKC).
    Clément, Christophe
    Stockholm University, Faculty of Science, Department of Physics. Stockholm University, Faculty of Science, The Oskar Klein Centre for Cosmo Particle Physics (OKC).
    Cribbs, Wayne A.
    Stockholm University, Faculty of Science, Department of Physics. Stockholm University, Faculty of Science, The Oskar Klein Centre for Cosmo Particle Physics (OKC).
    Gellerstedt, Karl
    Stockholm University, Faculty of Science, Department of Physics. Stockholm University, Faculty of Science, The Oskar Klein Centre for Cosmo Particle Physics (OKC).
    Hellman, Sten
    Stockholm University, Faculty of Science, Department of Physics. Stockholm University, Faculty of Science, The Oskar Klein Centre for Cosmo Particle Physics (OKC).
    Jon-And, Kerstin
    Stockholm University, Faculty of Science, Department of Physics. Stockholm University, Faculty of Science, The Oskar Klein Centre for Cosmo Particle Physics (OKC).
    Lundberg, Olof
    Stockholm University, Faculty of Science, Department of Physics. Stockholm University, Faculty of Science, The Oskar Klein Centre for Cosmo Particle Physics (OKC).
    Milstead, David A.
    Stockholm University, Faculty of Science, Department of Physics. Stockholm University, Faculty of Science, The Oskar Klein Centre for Cosmo Particle Physics (OKC).
    Moa, Torbjörn
    Stockholm University, Faculty of Science, Department of Physics. Stockholm University, Faculty of Science, The Oskar Klein Centre for Cosmo Particle Physics (OKC).
    Molander, Simon
    Stockholm University, Faculty of Science, Department of Physics. Stockholm University, Faculty of Science, The Oskar Klein Centre for Cosmo Particle Physics (OKC).
    Shaikh, Nabila W.
    Stockholm University, Faculty of Science, Department of Physics. Stockholm University, Faculty of Science, The Oskar Klein Centre for Cosmo Particle Physics (OKC).
    Shcherbakova, Anna
    Stockholm University, Faculty of Science, Department of Physics. Stockholm University, Faculty of Science, The Oskar Klein Centre for Cosmo Particle Physics (OKC).
    Silverstein, Samuel B.
    Stockholm University, Faculty of Science, Department of Physics.
    Sjölin, Jörgen
    Stockholm University, Faculty of Science, Department of Physics. Stockholm University, Faculty of Science, The Oskar Klein Centre for Cosmo Particle Physics (OKC).
    Strandberg, Sara
    Stockholm University, Faculty of Science, Department of Physics. Stockholm University, Faculty of Science, The Oskar Klein Centre for Cosmo Particle Physics (OKC).
    Ughetto, Michaël
    Stockholm University, Faculty of Science, Department of Physics. Stockholm University, Faculty of Science, The Oskar Klein Centre for Cosmo Particle Physics (OKC).
    Valdes Santurio, Eduardo
    Stockholm University, Faculty of Science, Department of Physics. Stockholm University, Faculty of Science, The Oskar Klein Centre for Cosmo Particle Physics (OKC).
    Wallängen, Veronica
    Stockholm University, Faculty of Science, Department of Physics. Stockholm University, Faculty of Science, The Oskar Klein Centre for Cosmo Particle Physics (OKC).
    Measurement of long-range multiparticle azimuthal correlations with the subevent cumulant method in pp and p plus Pb collisions with the ATLAS detector at the CERN Large Hadron Collider2018In: Physical Review C: Covering Nuclear Physics, ISSN 2469-9985, E-ISSN 2469-9993, Vol. 97, no 2, article id 024904Article in journal (Refereed)
    Abstract [en]

    A detailed study of multiparticle azimuthal correlations is presented using pp data at root s = 5.02 and 13 TeV, and p+Pb data at root s(NN) = 5.02 TeV, recorded with the ATLAS detector at the CERN Large Hadron Collider. The azimuthal correlations are probed using four-particle cumulants c(n){4} and flow coefficients v(n){4} = (-c(n){4})(1/4) for n = 2 and 3, with the goal of extracting long-range multiparticle azimuthal correlation signals and suppressing the short-range correlations. The values of c(n){4} are obtained as a function of the average number of charged particles per event, < N-ch >, using the recently proposed two-subevent and three-subevent cumulant methods, and compared with results obtained with the standard cumulant method. The standard method is found to be strongly biased by short-range correlations, which originate mostly from jetswith a positive contribution to c(n){4}. The threesubevent method, on the other hand, is found to be least sensitive to short-range correlations. The three-subevent method gives a negative c(2){4}, and therefore a well-defined v(2){4}, nearly independent of < N-ch >, which implies that the long-range multiparticle azimuthal correlations persist to events with low multiplicity. Furthermore, v(2){4} is found to be smaller than the v(2){2} measured using the two-particle correlation method, as expected for long-range collective behavior. Finally, the measured values of v(2){4} and v(2){2} are used to estimate the number of sources relevant for the initial eccentricity in the collision geometry. The results based on the subevent cumulant technique provide direct evidence, in small collision systems, for a long-range collectivity involving many particles distributed across a broad rapidity interval.

  • 15.
    Abulaiti, Yiming
    et al.
    Stockholm University, Faculty of Science, Department of Physics. Stockholm University, Faculty of Science, The Oskar Klein Centre for Cosmo Particle Physics (OKC).
    Åkerstedt, Henrik
    Stockholm University, Faculty of Science, Department of Physics. Stockholm University, Faculty of Science, The Oskar Klein Centre for Cosmo Particle Physics (OKC).
    Åsman, Barbro
    Stockholm University, Faculty of Science, Department of Physics. Stockholm University, Faculty of Science, The Oskar Klein Centre for Cosmo Particle Physics (OKC).
    Bendtz, Katarina
    Stockholm University, Faculty of Science, Department of Physics. Stockholm University, Faculty of Science, The Oskar Klein Centre for Cosmo Particle Physics (OKC).
    Bertoli, Gabriele
    Stockholm University, Faculty of Science, Department of Physics. Stockholm University, Faculty of Science, The Oskar Klein Centre for Cosmo Particle Physics (OKC).
    Bessidskaia Bylund, Olga
    Stockholm University, Faculty of Science, Department of Physics. Stockholm University, Faculty of Science, The Oskar Klein Centre for Cosmo Particle Physics (OKC).
    Bohm, Christian
    Stockholm University, Faculty of Science, Department of Physics.
    Carney, Rebecca M. D.
    Stockholm University, Faculty of Science, Department of Physics. Stockholm University, Faculty of Science, The Oskar Klein Centre for Cosmo Particle Physics (OKC).
    Clement, Christophe
    Stockholm University, Faculty of Science, Department of Physics. Stockholm University, Faculty of Science, The Oskar Klein Centre for Cosmo Particle Physics (OKC).
    Cribbs, Wayne A.
    Stockholm University, Faculty of Science, Department of Physics. Stockholm University, Faculty of Science, The Oskar Klein Centre for Cosmo Particle Physics (OKC).
    Gellerstedt, Karl
    Stockholm University, Faculty of Science, Department of Physics. Stockholm University, Faculty of Science, The Oskar Klein Centre for Cosmo Particle Physics (OKC).
    Hellman, Sten
    Stockholm University, Faculty of Science, Department of Physics. Stockholm University, Faculty of Science, The Oskar Klein Centre for Cosmo Particle Physics (OKC).
    Jon-And, Kerstin
    Stockholm University, Faculty of Science, Department of Physics. Stockholm University, Faculty of Science, The Oskar Klein Centre for Cosmo Particle Physics (OKC).
    Lundberg, Olof
    Stockholm University, Faculty of Science, Department of Physics. Stockholm University, Faculty of Science, The Oskar Klein Centre for Cosmo Particle Physics (OKC).
    Milstead, David A.
    Stockholm University, Faculty of Science, Department of Physics. Stockholm University, Faculty of Science, The Oskar Klein Centre for Cosmo Particle Physics (OKC).
    Moa, Torbjörn
    Stockholm University, Faculty of Science, Department of Physics. Stockholm University, Faculty of Science, The Oskar Klein Centre for Cosmo Particle Physics (OKC).
    Molander, Simon
    Stockholm University, Faculty of Science, Department of Physics. Stockholm University, Faculty of Science, The Oskar Klein Centre for Cosmo Particle Physics (OKC).
    Pani, Priscilla
    Stockholm University, Faculty of Science, Department of Physics. Stockholm University, Faculty of Science, The Oskar Klein Centre for Cosmo Particle Physics (OKC).
    Pöttgen, Ruth
    Stockholm University, Faculty of Science, Department of Physics. Stockholm University, Faculty of Science, The Oskar Klein Centre for Cosmo Particle Physics (OKC).
    Rossetti, Valerio
    Stockholm University, Faculty of Science, Department of Physics. Stockholm University, Faculty of Science, The Oskar Klein Centre for Cosmo Particle Physics (OKC).
    Shaikh, Nabila W.
    Stockholm University, Faculty of Science, Department of Physics. Stockholm University, Faculty of Science, The Oskar Klein Centre for Cosmo Particle Physics (OKC).
    Shcherbakova, Anna
    Stockholm University, Faculty of Science, Department of Physics. Stockholm University, Faculty of Science, The Oskar Klein Centre for Cosmo Particle Physics (OKC).
    Silverstein, Samuel B.
    Stockholm University, Faculty of Science, Department of Physics.
    Sjölin, Jörgen
    Stockholm University, Faculty of Science, Department of Physics. Stockholm University, Faculty of Science, The Oskar Klein Centre for Cosmo Particle Physics (OKC).
    Strandberg, Sara
    Stockholm University, Faculty of Science, Department of Physics. Stockholm University, Faculty of Science, The Oskar Klein Centre for Cosmo Particle Physics (OKC).
    Ughetto, Michaël
    Stockholm University, Faculty of Science, Department of Physics. Stockholm University, Faculty of Science, The Oskar Klein Centre for Cosmo Particle Physics (OKC).
    Santurio, E. Valdes
    Stockholm University, Faculty of Science, Department of Physics. Stockholm University, Faculty of Science, The Oskar Klein Centre for Cosmo Particle Physics (OKC).
    Wallängen, Veronica
    Stockholm University, Faculty of Science, Department of Physics. Stockholm University, Faculty of Science, The Oskar Klein Centre for Cosmo Particle Physics (OKC).
    Measurements of long-range azimuthal anisotropies and associated Fourier coefficients for pp collisions at root s=5.02 and 13 TeV and p plus Pb collisions at root(NN)-N-s=5.02 TeV with the ATLAS detector2017In: Physical Review C: Covering Nuclear Physics, ISSN 2469-9985, E-ISSN 2469-9993, Vol. 96, no 2, article id 024908Article in journal (Refereed)
    Abstract [en]

    ATLAS measurements of two-particle correlations are presented for root s = 5.02 and 13 TeV pp collisions and for root(NN)-N-s = 5.02 TeV p + Pb collisions at the LHC. The correlation functions are measured as a function of relative azimuthal angle Delta phi, and pseudorapidity separation Delta eta, using charged particles detected within the pseudorapidity interval |eta| < 2.5. Azimuthal modulation in the long-range component of the correlation function, with | Delta eta| > 2, is studied using a template fitting procedure to remove a back-to-back contribution to the correlation function that primarily arises from hard-scattering processes. In addition to the elliptic, cos(2 Delta phi), modulation observed in a previous measurement, the pp correlation functions exhibit significant cos(3 Delta phi) and cos(4 Lambda phi) modulation. The Fourier coefficients v(n),(n) associated with the cos (n Lambda phi) modulation of the correlation functions for n = 2-4 are measured as a function of charged-particle multiplicity and charged-particle transverse momentum. The Fourier coefficients are observed to be compatible with cos(n phi) modulation of per-event singleparticle azimuthal angle distributions. The single-particle Fourier coefficients vn are measured as a function of charged-particle multiplicity, and charged-particle transverse momentum for n = 2-4. The integrated luminosities used in this analysis are, 64 nb(-1) for the root s = 13 TeV pp data, 170 nb(-1) for the root s = 5.02 TeV pp data, and 28 nb(-1) for the root(NN)-N-s = 5.02 TeV p + Pb data.

  • 16.
    Abulaiti, Yiming
    et al.
    Stockholm University, Faculty of Science, Department of Physics. Stockholm University, Faculty of Science, The Oskar Klein Centre for Cosmo Particle Physics (OKC).
    Åkerstedt, Henrik
    Stockholm University, Faculty of Science, Department of Physics. Stockholm University, Faculty of Science, The Oskar Klein Centre for Cosmo Particle Physics (OKC).
    Åsman, Barbro
    Stockholm University, Faculty of Science, Department of Physics. Stockholm University, Faculty of Science, The Oskar Klein Centre for Cosmo Particle Physics (OKC).
    Bendtz, Katarina
    Stockholm University, Faculty of Science, Department of Physics. Stockholm University, Faculty of Science, The Oskar Klein Centre for Cosmo Particle Physics (OKC).
    Bertoli, Gabriele
    Stockholm University, Faculty of Science, Department of Physics. Stockholm University, Faculty of Science, The Oskar Klein Centre for Cosmo Particle Physics (OKC).
    Bessidskaia Bylund, Olga
    Stockholm University, Faculty of Science, Department of Physics. Stockholm University, Faculty of Science, The Oskar Klein Centre for Cosmo Particle Physics (OKC).
    Bohm, Christian
    Stockholm University, Faculty of Science, Department of Physics.
    Clément, Christophe
    Stockholm University, Faculty of Science, Department of Physics. Stockholm University, Faculty of Science, The Oskar Klein Centre for Cosmo Particle Physics (OKC).
    Cribbs, Wayne A.
    Stockholm University, Faculty of Science, Department of Physics. Stockholm University, Faculty of Science, The Oskar Klein Centre for Cosmo Particle Physics (OKC).
    Hellman, Sten
    Stockholm University, Faculty of Science, Department of Physics. Stockholm University, Faculty of Science, The Oskar Klein Centre for Cosmo Particle Physics (OKC).
    Jon-And, Kerstin
    Stockholm University, Faculty of Science, Department of Physics. Stockholm University, Faculty of Science, The Oskar Klein Centre for Cosmo Particle Physics (OKC).
    Lundberg, Olof
    Stockholm University, Faculty of Science, Department of Physics. Stockholm University, Faculty of Science, The Oskar Klein Centre for Cosmo Particle Physics (OKC).
    Milstead, David A.
    Stockholm University, Faculty of Science, Department of Physics. Stockholm University, Faculty of Science, The Oskar Klein Centre for Cosmo Particle Physics (OKC).
    Moa, Torbjörn
    Stockholm University, Faculty of Science, Department of Physics. Stockholm University, Faculty of Science, The Oskar Klein Centre for Cosmo Particle Physics (OKC).
    Molander, Simon
    Stockholm University, Faculty of Science, Department of Physics. Stockholm University, Faculty of Science, The Oskar Klein Centre for Cosmo Particle Physics (OKC).
    Pani, Priscilla
    Stockholm University, Faculty of Science, Department of Physics. Stockholm University, Faculty of Science, The Oskar Klein Centre for Cosmo Particle Physics (OKC).
    Pöttgen, Ruth
    Stockholm University, Faculty of Science, Department of Physics. Stockholm University, Faculty of Science, The Oskar Klein Centre for Cosmo Particle Physics (OKC).
    Rossetti, Valerio
    Stockholm University, Faculty of Science, Department of Physics. Stockholm University, Faculty of Science, The Oskar Klein Centre for Cosmo Particle Physics (OKC).
    Shaikh, Nabila W.
    Stockholm University, Faculty of Science, Department of Physics. Stockholm University, Faculty of Science, The Oskar Klein Centre for Cosmo Particle Physics (OKC).
    Shcherbakova, Anna
    Stockholm University, Faculty of Science, Department of Physics. Stockholm University, Faculty of Science, The Oskar Klein Centre for Cosmo Particle Physics (OKC).
    Silverstein, Samuel B.
    Stockholm University, Faculty of Science, Department of Physics.
    Sjölin, Jörgen
    Stockholm University, Faculty of Science, Department of Physics. Stockholm University, Faculty of Science, The Oskar Klein Centre for Cosmo Particle Physics (OKC).
    Strandberg, Sara
    Stockholm University, Faculty of Science, Department of Physics. Stockholm University, Faculty of Science, The Oskar Klein Centre for Cosmo Particle Physics (OKC).
    Ughetto, Michaël
    Stockholm University, Faculty of Science, Department of Physics. Stockholm University, Faculty of Science, The Oskar Klein Centre for Cosmo Particle Physics (OKC).
    Valdes Santurio, Eduardo
    Stockholm University, Faculty of Science, Department of Physics. Stockholm University, Faculty of Science, The Oskar Klein Centre for Cosmo Particle Physics (OKC).
    Wallängen, Veronica
    Stockholm University, Faculty of Science, Department of Physics. Stockholm University, Faculty of Science, The Oskar Klein Centre for Cosmo Particle Physics (OKC).
    Femtoscopy with identified charged pions in proton-lead collisions at root s(NN)=5.02 TeV with ATLAS2017In: Physical Review C: Covering Nuclear Physics, ISSN 2469-9985, E-ISSN 2469-9993, Vol. 96, no 6, article id 064908Article in journal (Refereed)
    Abstract [en]

    Bose-Einstein correlations between identified charged pions are measured for p+Pb collisions at root s(NN) = 5.02 TeV using data recorded by the ATLAS detector at the CERN Large Hadron Collider corresponding to a total integrated luminosity of 28 nb(-1). Pions are identified using ionization energy loss measured in the pixel detector. Two-particle correlation functions and the extracted source radii are presented as a function of collision centrality as well as the average transverse momentum (k(T)) and rapidity (y*(pi pi)) of the pair. Pairs are selected with a rapidity -2 < y*(pi pi) < 1 and with an average transverse momentum 0.1 < k(T) < 0.8 GeV. The effect of jet fragmentation on the two-particle correlation function is studied, and a method using opposite-charge pair data to constrain its contributions to the measured correlations is described. The measured source sizes are substantially larger in more central collisions and are observed to decrease with increasing pair k(T). A correlation of the radii with the local charged-particle density is demonstrated. The scaling of the extracted radii with the mean number of participating nucleons is also used to compare a selection of initial-geometry models. The cross term R-ol is measured as a function of rapidity, and a nonzero value is observed with 5.1 sigma combined significance for -1 < y*pi pi < 1 in the most central events.

  • 17.
    Abulaiti, Yiming
    et al.
    Stockholm University, Faculty of Science, Department of Physics. Stockholm University, Faculty of Science, The Oskar Klein Centre for Cosmo Particle Physics (OKC).
    Åkerstedt, Henrik
    Stockholm University, Faculty of Science, Department of Physics. Stockholm University, Faculty of Science, The Oskar Klein Centre for Cosmo Particle Physics (OKC).
    Åsman, Barbro
    Stockholm University, Faculty of Science, Department of Physics. Stockholm University, Faculty of Science, The Oskar Klein Centre for Cosmo Particle Physics (OKC).
    Bendtz, Katarina
    Stockholm University, Faculty of Science, Department of Physics. Stockholm University, Faculty of Science, The Oskar Klein Centre for Cosmo Particle Physics (OKC).
    Bertoli, Gabriele
    Stockholm University, Faculty of Science, Department of Physics. Stockholm University, Faculty of Science, The Oskar Klein Centre for Cosmo Particle Physics (OKC).
    Bessidskaia Bylund, Olga
    Stockholm University, Faculty of Science, Department of Physics. Stockholm University, Faculty of Science, The Oskar Klein Centre for Cosmo Particle Physics (OKC).
    Bohm, Christian
    Stockholm University, Faculty of Science, Department of Physics.
    Clément, Christophe
    Stockholm University, Faculty of Science, Department of Physics. Stockholm University, Faculty of Science, The Oskar Klein Centre for Cosmo Particle Physics (OKC).
    Cribbs, Wayne A.
    Stockholm University, Faculty of Science, Department of Physics. Stockholm University, Faculty of Science, The Oskar Klein Centre for Cosmo Particle Physics (OKC).
    Hellman, Sten
    Stockholm University, Faculty of Science, Department of Physics. Stockholm University, Faculty of Science, The Oskar Klein Centre for Cosmo Particle Physics (OKC).
    Jon-And, Kerstin
    Stockholm University, Faculty of Science, Department of Physics. Stockholm University, Faculty of Science, The Oskar Klein Centre for Cosmo Particle Physics (OKC).
    Lundberg, Olof
    Stockholm University, Faculty of Science, Department of Physics. Stockholm University, Faculty of Science, The Oskar Klein Centre for Cosmo Particle Physics (OKC).
    Milstead, David A.
    Stockholm University, Faculty of Science, Department of Physics. Stockholm University, Faculty of Science, The Oskar Klein Centre for Cosmo Particle Physics (OKC).
    Moa, Torbjörn
    Stockholm University, Faculty of Science, Department of Physics. Stockholm University, Faculty of Science, The Oskar Klein Centre for Cosmo Particle Physics (OKC).
    Molander, Simon
    Stockholm University, Faculty of Science, Department of Physics. Stockholm University, Faculty of Science, The Oskar Klein Centre for Cosmo Particle Physics (OKC).
    Pani, Priscilla
    Stockholm University, Faculty of Science, Department of Physics. Stockholm University, Faculty of Science, The Oskar Klein Centre for Cosmo Particle Physics (OKC).
    Pöttgen, Ruth
    Stockholm University, Faculty of Science, Department of Physics. Stockholm University, Faculty of Science, The Oskar Klein Centre for Cosmo Particle Physics (OKC).
    Rossetti, Valerio
    Stockholm University, Faculty of Science, Department of Physics. Stockholm University, Faculty of Science, The Oskar Klein Centre for Cosmo Particle Physics (OKC).
    Shaikh, Nabila W.
    Stockholm University, Faculty of Science, Department of Physics. Stockholm University, Faculty of Science, The Oskar Klein Centre for Cosmo Particle Physics (OKC).
    Shcherbakova, Anna
    Stockholm University, Faculty of Science, Department of Physics. Stockholm University, Faculty of Science, The Oskar Klein Centre for Cosmo Particle Physics (OKC).
    Silverstein, Samuel B.
    Stockholm University, Faculty of Science, Department of Physics.
    Sjölin, Jörgen
    Stockholm University, Faculty of Science, Department of Physics. Stockholm University, Faculty of Science, The Oskar Klein Centre for Cosmo Particle Physics (OKC).
    Strandberg, Sara
    Stockholm University, Faculty of Science, Department of Physics. Stockholm University, Faculty of Science, The Oskar Klein Centre for Cosmo Particle Physics (OKC).
    Ughetto, Michaël
    Stockholm University, Faculty of Science, Department of Physics. Stockholm University, Faculty of Science, The Oskar Klein Centre for Cosmo Particle Physics (OKC).
    Valdes Santurio, Eduardo
    Stockholm University, Faculty of Science, Department of Physics. Stockholm University, Faculty of Science, The Oskar Klein Centre for Cosmo Particle Physics (OKC).
    Wallängen, Veronica
    Stockholm University, Faculty of Science, Department of Physics. Stockholm University, Faculty of Science, The Oskar Klein Centre for Cosmo Particle Physics (OKC).
    Measurement of forward-backward multiplicity correlations in lead-lead, proton-lead, and proton-proton collisions with the ATLAS detector2017In: Physical Review C: Covering Nuclear Physics, ISSN 2469-9985, E-ISSN 2469-9993, Vol. 95, no 6, article id 064914Article in journal (Refereed)
    Abstract [en]

    Two-particle pseudorapidity correlations are measured in root s(NN) = 2.76 TeV Pb + Pb, root s(NN) = 5.02 TeV p+Pb, and root s = 13 TeV pp collisions at the Large Hadron Collider (LHC), with total integrated luminosities of approximately 7 mu b(-1), 28 nb(-1), and 65 nb(-1), respectively. The correlation function CN(eta(1),eta(2))is measured as a function of event multiplicity using charged particles in the pseudorapidity range |eta| < 2.4. The correlation function contains a significant short-range component, which is estimated and subtracted. After removal of the short-range component, the shape of the correlation function is described approximately by 1 + < a(1)(2)>(1/2) eta(1) eta(2) in all collision systems over the full multiplicity range. The values of < a(1)(2)>(1/2) are consistent for the opposite-charge pairs and same-charge pairs, and for the three collision systems at similar multiplicity. The values of < a(1)(2)>(1/2) and the magnitude of the short-range component both follow a power-law dependence on the event multiplicity. The short-range component in p + Pb collisions, after symmetrizing the proton and lead directions, is found to be smaller at a given eta than in pp collisions with comparable multiplicity.

  • 18.
    Adlarson, Patrik
    et al.
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Augustyniak, W.
    Natl Ctr Nucl Res, Div Nucl Phys, Ul Hoza 69, PL-00681 Warsaw, Poland.
    Bardan, W.
    Jagiellonian Univ, Inst Phys, Prof Stanislawa Lojasiewicza 11, PL-30348 Krakow, Poland.
    Bashkanov, M.
    Univ York, Dept Phys, York YO10 5DD, N Yorkshire, England.
    Bergmann, F. S.
    Westfalische Wilhelms Univ Munster, Inst Kernphys, Wilhelm Klemm Str 9, D-48149 Munster, Germany.
    Berlowski, M.
    Natl Ctr Nucl Res, High Energy Phys Div, Ul Hoza 69, PL-00681 Warsaw, Poland.
    Bondar, A.
    RAS, SB, Budker Inst Nucl Phys, 11 Acad Lavrentieva Pr, Novosibirsk 630090, Russia;Novosibirsk State Univ, 2 Pirogova Str, Novosibirsk 630090, Russia.
    Buescher, M.
    Forschungszentrum Julich, Peter Grunberg Inst, PGI 6 Elekt Eigenschaften, D-52425 Julich, Germany;Heinrich Heine Univ Dusseldorf, Inst Laser & Plasmaphys, Univ Str 1, D-40225 Dusseldorf, Germany.
    Calén, Hans
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Ciepal, I.
    Polish Acad Sci, Henryk Niewodniczanski Inst Nucl Phys, Ul Radzikowskiego 152, PL-31342 Krakow, Poland.
    Clement, H.
    Eberhard Karls Univ Tubingen, Inst Phys, Morgenstelle 14, D-72076 Tubingen, Germany;Univ Tubingen, Inst Phys, Kepler Ctr Astro & Particle Phys, Morgenstelle 14, D-72076 Tubingen, Germany.
    Czerwinski, E.
    Jagiellonian Univ, Inst Phys, Prof Stanislawa Lojasiewicza 11, PL-30348 Krakow, Poland.
    Demmich, K.
    Westfalische Wilhelms Univ Munster, Inst Kernphys, Wilhelm Klemm Str 9, D-48149 Munster, Germany.
    Engels, R.
    Forschungszentrum Julich, Inst Kernphys, D-52425 Julich, Germany.
    Erven, A.
    Forschungszentrum Julich, Zent Inst Engn Elekt & Analyt, D-52425 Julich, Germany.
    Erven, W.
    Forschungszentrum Julich, Zent Inst Engn Elekt & Analyt, D-52425 Julich, Germany.
    Eyrich, W.
    Friedrich Alexander Univ Erlangen Nurnberg, Inst Phys, Erwin Rommel Str 1, D-91058 Erlangen, Germany.
    Fedorets, P.
    Forschungszentrum Julich, Inst Kernphys, D-52425 Julich, Germany;Natl Res Ctr Kurchatov Inst, Inst Theoret & Expt Phys, 25 Bolshaya Cheremushkinskaya Str, Moscow 117218, Russia.
    Foehl, K.
    Justus Liebig Univ Giessen, Inst Phys 2, Heinrich Buff Ring 16, D-35392 Giessen, Germany.
    Fransson, Kjell
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Goldenbaum, F.
    Forschungszentrum Julich, Inst Kernphys, D-52425 Julich, Germany.
    Goswami, A.
    Forschungszentrum Julich, Inst Kernphys, D-52425 Julich, Germany;Indian Inst Technol Indore, Discipline Phys, Khandwa Rd, Indore 453552, Madhya Pradesh, India.
    Grigoryev, K.
    Forschungszentrum Julich, Inst Kernphys, D-52425 Julich, Germany;Natl Res Ctr Kurchatov Inst, High Energy Phys Div, Petersburg Nucl Phys Inst, 1 Mkr Orlova roshcha, Gatchina 188300, Leningradskaya, Russia.
    Heijkenskjöld, Lena
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics. Johannes Gutenberg Univ Mainz, Inst Kernphys, Johann Joachim Becher Weg 45, D-55128 Mainz, Germany.
    Hejny, V.
    Forschungszentrum Julich, Inst Kernphys, D-52425 Julich, Germany.
    Huesken, N.
    Westfalische Wilhelms Univ Munster, Inst Kernphys, Wilhelm Klemm Str 9, D-48149 Munster, Germany.
    Jarczyk, L.
    Jagiellonian Univ, Inst Phys, Prof Stanislawa Lojasiewicza 11, PL-30348 Krakow, Poland.
    Johansson, Tord
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Kamys, B.
    Jagiellonian Univ, Inst Phys, Prof Stanislawa Lojasiewicza 11, PL-30348 Krakow, Poland.
    Kemmerling, G.
    Forschungszentrum Julich, Zent Inst Engn Elekt & Analyt, D-52425 Julich, Germany;Forschungszentrum Julich, JCNS, D-52425 Julich, Germany.
    Khoukaz, A.
    Westfalische Wilhelms Univ Munster, Inst Kernphys, Wilhelm Klemm Str 9, D-48149 Munster, Germany.
    Khreptak, O.
    Jagiellonian Univ, Inst Phys, Prof Stanislawa Lojasiewicza 11, PL-30348 Krakow, Poland.
    Kirillov, D. A.
    Joint Inst Nucl Phys, Veksler & Baldin Lab High Energiy Phys, 6 Joliot Curie, Dubna 141980, Russia.
    Kistryn, S.
    Jagiellonian Univ, Inst Phys, Prof Stanislawa Lojasiewicza 11, PL-30348 Krakow, Poland.
    Kleines, H.
    Forschungszentrum Julich, Zent Inst Engn Elekt & Analyt, D-52425 Julich, Germany;Forschungszentrum Julich, JCNS, D-52425 Julich, Germany.
    Klos, B.
    Univ Silesia, August Chelkowski Inst Phys, Ul 75 Pulku Piechoty 1, PL-41500 Chorzow, Poland.
    Krzemien, W.
    Natl Ctr Nucl Res, High Energy Phys Div, Ul Hoza 69, PL-00681 Warsaw, Poland.
    Kulessa, P.
    Polish Acad Sci, Henryk Niewodniczanski Inst Nucl Phys, Ul Radzikowskiego 152, PL-31342 Krakow, Poland.
    Kupsc, Andrzej
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics. Natl Ctr Nucl Res, High Energy Phys Div, Ul Hoza 69, PL-00681 Warsaw, Poland.
    Lalwani, K.
    Malaviya Natl Inst Technol Jaipur, Dept Phys, JLN Marg, Jaipur 302017, Rajasthan, India.
    Lersch, D.
    Forschungszentrum Julich, Inst Kernphys, D-52425 Julich, Germany;Florida State Univ, Dept Phys, 77 Chieftan Way, Tallahassee, FL 32306 USA.
    Lorentz, B.
    Forschungszentrum Julich, Inst Kernphys, D-52425 Julich, Germany.
    Magiera, A.
    Jagiellonian Univ, Inst Phys, Prof Stanislawa Lojasiewicza 11, PL-30348 Krakow, Poland.
    Maier, R.
    Forschungszentrum Julich, Inst Kernphys, D-52425 Julich, Germany;Forschungszentrum Julich, JARA FAME, Julich Aachen Res Alliance, D-52425 Julich, Germany;Rhein Westfal TH Aachen, D-52056 Aachen, Germany.
    Marciniewski, Pawel
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Marianski, B.
    Natl Ctr Nucl Res, Div Nucl Phys, Ul Hoza 69, PL-00681 Warsaw, Poland.
    Morsch, H. -P
    Moskal, P.
    Jagiellonian Univ, Inst Phys, Prof Stanislawa Lojasiewicza 11, PL-30348 Krakow, Poland.
    Ohm, H.
    Forschungszentrum Julich, Inst Kernphys, D-52425 Julich, Germany.
    Parol, W.
    Polish Acad Sci, Henryk Niewodniczanski Inst Nucl Phys, Ul Radzikowskiego 152, PL-31342 Krakow, Poland.
    del Rio, E. Perez
    Eberhard Karls Univ Tubingen, Inst Phys, Morgenstelle 14, D-72076 Tubingen, Germany;Univ Tubingen, Inst Phys, Kepler Ctr Astro & Particle Phys, Morgenstelle 14, D-72076 Tubingen, Germany;Ist Nazl Fis Nucl, Lab Nazl Frascati, Via E Fermi 40, I-00044 Frascati, Italy.
    Piskunov, N. M.
    Joint Inst Nucl Phys, Veksler & Baldin Lab High Energiy Phys, 6 Joliot Curie, Dubna 141980, Russia.
    Prasuhn, D.
    Forschungszentrum Julich, Inst Kernphys, D-52425 Julich, Germany.
    Pszczel, Damian
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics. Natl Ctr Nucl Res, High Energy Phys Div, Ul Hoza 69, PL-00681 Warsaw, Poland.
    Pysz, K.
    Polish Acad Sci, Henryk Niewodniczanski Inst Nucl Phys, Ul Radzikowskiego 152, PL-31342 Krakow, Poland.
    Ritman, J.
    Forschungszentrum Julich, Inst Kernphys, D-52425 Julich, Germany;Forschungszentrum Julich, JARA FAME, Julich Aachen Res Alliance, D-52425 Julich, Germany;Rhein Westfal TH Aachen, D-52056 Aachen, Germany;Ruhr Univ Bochum, Inst Expt Phys 1, Univ Str 150, D-44780 Bochum, Germany.
    Roy, A.
    Indian Inst Technol Indore, Discipline Phys, Khandwa Rd, Indore 453552, Madhya Pradesh, India.
    Rudy, Z.
    Jagiellonian Univ, Inst Phys, Prof Stanislawa Lojasiewicza 11, PL-30348 Krakow, Poland.
    Rundel, O.
    Jagiellonian Univ, Inst Phys, Prof Stanislawa Lojasiewicza 11, PL-30348 Krakow, Poland.
    Sawant, S.
    Indian Inst Technol, Dept Phys, Mumbai 400076, Maharashtra, India.
    Schadmand, S.
    Forschungszentrum Julich, Inst Kernphys, D-52425 Julich, Germany.
    Schatti-Ozerianska, I.
    Jagiellonian Univ, Inst Phys, Prof Stanislawa Lojasiewicza 11, PL-30348 Krakow, Poland.
    Sefzick, T.
    Forschungszentrum Julich, Inst Kernphys, D-52425 Julich, Germany.
    Serdyuk, V.
    Forschungszentrum Julich, Inst Kernphys, D-52425 Julich, Germany.
    Shwartz, B.
    RAS, SB, Budker Inst Nucl Phys, 11 Acad Lavrentieva Pr, Novosibirsk 630090, Russia;Novosibirsk State Univ, 2 Pirogova Str, Novosibirsk 630090, Russia.
    Skorodko, T.
    Eberhard Karls Univ Tubingen, Inst Phys, Morgenstelle 14, D-72076 Tubingen, Germany;Univ Tubingen, Inst Phys, Kepler Ctr Astro & Particle Phys, Morgenstelle 14, D-72076 Tubingen, Germany;Tomsk State Univ, Dept Phys, 36 Lenin Ave, Tomsk 634050, Russia.
    Skurzok, M.
    Jagiellonian Univ, Inst Phys, Prof Stanislawa Lojasiewicza 11, PL-30348 Krakow, Poland.
    Smyrski, J.
    Jagiellonian Univ, Inst Phys, Prof Stanislawa Lojasiewicza 11, PL-30348 Krakow, Poland.
    Sopov, V.
    Natl Res Ctr Kurchatov Inst, Inst Theoret & Expt Phys, 25 Bolshaya Cheremushkinskaya Str, Moscow 117218, Russia.
    Stassen, R.
    Forschungszentrum Julich, Inst Kernphys, D-52425 Julich, Germany.
    Stepaniak, J.
    Natl Ctr Nucl Res, High Energy Phys Div, Ul Hoza 69, PL-00681 Warsaw, Poland.
    Stephan, E.
    Univ Silesia, August Chelkowski Inst Phys, Ul 75 Pulku Piechoty 1, PL-41500 Chorzow, Poland.
    Sterzenbach, G.
    Forschungszentrum Julich, Inst Kernphys, D-52425 Julich, Germany.
    Stockhorst, H.
    Forschungszentrum Julich, Inst Kernphys, D-52425 Julich, Germany.
    Stroeher, H.
    Forschungszentrum Julich, Inst Kernphys, D-52425 Julich, Germany;Forschungszentrum Julich, JARA FAME, Julich Aachen Res Alliance, D-52425 Julich, Germany;Rhein Westfal TH Aachen, D-52056 Aachen, Germany.
    Szczurek, A.
    Polish Acad Sci, Henryk Niewodniczanski Inst Nucl Phys, Ul Radzikowskiego 152, PL-31342 Krakow, Poland.
    Trzcinski, A.
    Natl Ctr Nucl Res, Div Nucl Phys, Ul Hoza 69, PL-00681 Warsaw, Poland.
    Wolke, Magnus
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Wronska, A.
    Jagiellonian Univ, Inst Phys, Prof Stanislawa Lojasiewicza 11, PL-30348 Krakow, Poland.
    Wuestner, P.
    Forschungszentrum Julich, Zent Inst Engn Elekt & Analyt, D-52425 Julich, Germany.
    Yamamoto, A.
    High Energy Accelerator Res Org KEK, Tsukuba, Ibaraki 3050801, Japan.
    Zabierowski, J.
    Natl Ctr Nucl Res, Div Astrophys, Box 447, PL-90950 Lodz, Poland.
    Zielinski, M. J.
    Jagiellonian Univ, Inst Phys, Prof Stanislawa Lojasiewicza 11, PL-30348 Krakow, Poland.
    Zlomanczuk, Jozef
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Zupranski, P.
    Natl Ctr Nucl Res, Div Nucl Phys, Ul Hoza 69, PL-00681 Warsaw, Poland.
    Zurek, M.
    Forschungszentrum Julich, Inst Kernphys, D-52425 Julich, Germany.
    Examination of the production of an isotensor dibaryon in the pp -> pp pi(+)pi(-) reaction2019In: Physical Review C: Covering Nuclear Physics, ISSN 2469-9985, E-ISSN 2469-9993, Vol. 99, no 2, article id 025201Article in journal (Refereed)
    Abstract [en]

    The quasifree pp -> pp pi(+)pi(-) reaction has been measured by means of pd collisions at T-p = 1.2 GeV using the WASA detector setup at COSY enabling exclusive and kinematically complete measurements. Total and differential cross sections have been extracted for the energy region T-p = 1.08-1.36 GeV (root s = 2.35-2.46 GeV) covering thus the regions of N* (1440 ) and Delta(1232)Delta(1232) resonance excitations. Calculations describing these excitations by t-channel meson exchange as well as isospin relations based on the pp -> pp pi(0)pi(0) data underpredict substantially the measured total cross section. The calculations are also at variance with specific experimental differential cross sections. An isotensor Delta N dibaryon resonance with I(J(P)) = 2(1(+) ) produced associatedly with a pion is able to overcome these deficiencies. Such a dibaryon was predicted by Dyson and Xuong [Phys. Rev. Lett. 13, 815 (1964)] and more recently calculated by A. Gal and H. Garcilazo [Nucl. Phys. A 928, 73 (2014)].

  • 19. Auranen, K.
    et al.
    Uusitalo, J.
    Juutinen, S.
    Badran, H.
    Bisso, F. Defranchi
    Cox, D.
    Grahn, T.
    Greenlees, P. T.
    Herzan, A.
    Jakobsson, Ulrika
    KTH, School of Engineering Sciences (SCI), Physics. University of Helsinki, Finland.
    Julin, R.
    Konki, J.
    Leino, M.
    Lightfoot, A.
    Mallaburn, M. J.
    Neuvonen, O.
    Pakarinen, J.
    Papadakis, P.
    Partanen, J.
    Rahkila, P.
    Sandzelius, M.
    Saren, J.
    Scholey, C.
    Sorri, J.
    Stolze, S.
    Wang, Y. K.
    Prompt and delayed spectroscopy of At-203: Observation of a shears band and a 29/2(+) isomeric state2018In: Physical Review C: Covering Nuclear Physics, ISSN 2469-9985, E-ISSN 2469-9993, Vol. 97, no 2, article id 024301Article in journal (Refereed)
    Abstract [en]

    Using fusion-evaporation reactions, a gas-filled recoil separator, recoil-gating technique and recoil-isomer decay tagging technique we have extended the level scheme of At-203 (N = 118) significantly. We have observed an isomeric [tau = 14.1(3) mu s] state with a spin and parity of 29/2(+). The isomeric state is suggested to originate from the pi(h(9/2)) circle times |Po-202; 11(-)> coupling, and it is depopulated through 286 keV E2 and 366 keV E3 transitions. In addition, we have observed a cascade of magnetic-dipole transitions which is suggested to be generated by the shears mechanism.

  • 20. Auranen, K.
    et al.
    Uusitalo, J.
    Juutinen, S.
    Badran, H.
    Bisso, F. Defranchi
    Cox, D.
    Grahn, T.
    Greenlees, P. T.
    Herzan, A.
    Jakobsson, Ulrika
    KTH, School of Engineering Sciences (SCI), Physics.
    Julin, R.
    Konki, J.
    Leino, M.
    Lightfoot, A.
    Mallaburn, M.
    Neuvonen, O.
    Pakarinen, J.
    Papadakis, P.
    Partanen, J.
    Rahkila, P.
    Sandzelius, M.
    Saren, J.
    Scholey, C.
    Sorri, J.
    Stolze, S.
    Experimental study of isomeric intruder 1/2(+) states in At-197,At-2032017In: Physical Review C: Covering Nuclear Physics, ISSN 2469-9985, E-ISSN 2469-9993, Vol. 95, no 4, article id 044311Article in journal (Refereed)
    Abstract [en]

    A newly observed isomeric intruder 1/2(+) state [T-1/2 = 3.5( 6) ms] is identified in At-203 using a gas-filled recoil separator and fusion-evaporation reactions. The isomer is depopulated through a cascade of E3 and mixed M1/E2 transitions to the 9/2(-) ground state, and it is suggested to originate from the pi(s(1/2))(-1) configuration. In addition, the structures above the 1/2(+) state in At-203 and At-197 are studied using in-beam gamma-ray spectroscopy, recoil-decay tagging, and recoil-isomer decay tagging methods. The 1/2(+) state is fed from 3/2(+) and 5/2(+) states, and the origin of these states are discussed.

  • 21.
    Backman, Filip
    et al.
    Stockholm University, Faculty of Science, Department of Physics. Stockholm University, Faculty of Science, The Oskar Klein Centre for Cosmo Particle Physics (OKC).
    Barranco Navarro, Laura
    Stockholm University, Faculty of Science, Department of Physics. Stockholm University, Faculty of Science, The Oskar Klein Centre for Cosmo Particle Physics (OKC).
    Bohm, Christian
    Stockholm University, Faculty of Science, Department of Physics.
    Carney, Rebecca M. D.
    Stockholm University, Faculty of Science, Department of Physics. Stockholm University, Faculty of Science, The Oskar Klein Centre for Cosmo Particle Physics (OKC).
    Clément, Christophe
    Stockholm University, Faculty of Science, Department of Physics. Stockholm University, Faculty of Science, The Oskar Klein Centre for Cosmo Particle Physics (OKC).
    Hellman, Sten
    Stockholm University, Faculty of Science, Department of Physics. Stockholm University, Faculty of Science, The Oskar Klein Centre for Cosmo Particle Physics (OKC).
    Jon-And, Kerstin
    Stockholm University, Faculty of Science, Department of Physics. Stockholm University, Faculty of Science, The Oskar Klein Centre for Cosmo Particle Physics (OKC).
    Kastanas, Alexandros
    Stockholm University, Faculty of Science, Department of Physics. Stockholm University, Faculty of Science, The Oskar Klein Centre for Cosmo Particle Physics (OKC).
    Milstead, David A.
    Stockholm University, Faculty of Science, Department of Physics. Stockholm University, Faculty of Science, The Oskar Klein Centre for Cosmo Particle Physics (OKC).
    Moa, Torbjörn
    Stockholm University, Faculty of Science, Department of Physics. Stockholm University, Faculty of Science, The Oskar Klein Centre for Cosmo Particle Physics (OKC).
    Pasuwan, Patrawan
    Stockholm University, Faculty of Science, Department of Physics. Stockholm University, Faculty of Science, The Oskar Klein Centre for Cosmo Particle Physics (OKC).
    Shaikh, Nabila W.
    Stockholm University, Faculty of Science, Department of Physics. Stockholm University, Faculty of Science, The Oskar Klein Centre for Cosmo Particle Physics (OKC).
    Silverstein, Samuel B.
    Stockholm University, Faculty of Science, Department of Physics.
    Sjölin, Jörgen
    Stockholm University, Faculty of Science, Department of Physics. Stockholm University, Faculty of Science, The Oskar Klein Centre for Cosmo Particle Physics (OKC).
    Strandberg, Sara
    Stockholm University, Faculty of Science, Department of Physics. Stockholm University, Faculty of Science, The Oskar Klein Centre for Cosmo Particle Physics (OKC).
    Ughetto, Michaël
    Stockholm University, Faculty of Science, Department of Physics. Stockholm University, Faculty of Science, The Oskar Klein Centre for Cosmo Particle Physics (OKC).
    Valdes Santurio, Eduardo
    Stockholm University, Faculty of Science, Department of Physics. Stockholm University, Faculty of Science, The Oskar Klein Centre for Cosmo Particle Physics (OKC).
    Wallängen, Veronica
    Stockholm University, Faculty of Science, Department of Physics. Stockholm University, Faculty of Science, The Oskar Klein Centre for Cosmo Particle Physics (OKC).
    Measurement of angular and momentum distributions of charged particles within and around jets in Pb plus Pb and pp collisions at root s(NN)=5.02 TeV with the ATLAS detector2019In: Physical Review C: Covering Nuclear Physics, ISSN 2469-9985, E-ISSN 2469-9993, Vol. 100, no 6, article id 064901Article in journal (Refereed)
    Abstract [en]

    Studies of the fragmentation of jets into charged particles in heavy-ion collisions can provide information about the mechanism of jet quenching by the hot and dense QCD matter created in such collisions, the quark-gluon plasma. This paper presents a measurement of the angular distribution of charged particles around the jet axis in root s(NN) = 5.02 TeV Pb + Pb and pp collisions, using the ATLAS detector at the LHC. The Pb + Pb and pp data sets have integrated luminosities of 0.49 nb(-1) and 25 pb(-1), respectively. The measurement is performed for jets reconstructed with the anti-k(t) algorithm with radius parameter R = 0.4 and is extended to an angular distance of r = 0.8 from the jet axis. Results are presented as a function of Pb + Pb collision centrality and distance from the jet axis for charged particles with transverse momenta in the 1- to 63-GeV range, matched to jets with transverse momenta in the 126- to 316-GeV range and an absolute value of jet rapidity of less than 1.7. Modifications to the measured distributions are quantified by taking a ratio to the measurements in pp collisions. Yields of charged particles with transverse momenta below 4 GeV are observed to be increasingly enhanced as a function of angular distance from the jet axis, reaching a maximum at r = 0.6. Charged particles with transverse momenta above 4 GeV have an enhanced yield in Pb + Pb collisions in the jet core for angular distances up to r = 0.05 from the jet axis, with a suppression at larger distances.

  • 22.
    Backman, Filip
    et al.
    Stockholm University, Faculty of Science, Department of Physics. Stockholm University, Faculty of Science, The Oskar Klein Centre for Cosmo Particle Physics (OKC).
    Barranco Navarro, Laura
    Stockholm University, Faculty of Science, Department of Physics. Stockholm University, Faculty of Science, The Oskar Klein Centre for Cosmo Particle Physics (OKC).
    Bohm, Christian
    Stockholm University, Faculty of Science, Department of Physics.
    Clement, Christophe
    Stockholm University, Faculty of Science, Department of Physics. Stockholm University, Faculty of Science, The Oskar Klein Centre for Cosmo Particle Physics (OKC).
    Hellman, Sten
    Stockholm University, Faculty of Science, Department of Physics. Stockholm University, Faculty of Science, The Oskar Klein Centre for Cosmo Particle Physics (OKC).
    Kastanas, Alexandros
    Stockholm University, Faculty of Science, Department of Physics. Stockholm University, Faculty of Science, The Oskar Klein Centre for Cosmo Particle Physics (OKC).
    Milstead, David A.
    Stockholm University, Faculty of Science, Department of Physics. Stockholm University, Faculty of Science, The Oskar Klein Centre for Cosmo Particle Physics (OKC).
    Moa, Torbjörn
    Stockholm University, Faculty of Science, Department of Physics. Stockholm University, Faculty of Science, The Oskar Klein Centre for Cosmo Particle Physics (OKC).
    Nelson, Michael E.
    Stockholm University, Faculty of Science, Department of Physics. Stockholm University, Faculty of Science, The Oskar Klein Centre for Cosmo Particle Physics (OKC).
    Pasuwan, Patrawan
    Stockholm University, Faculty of Science, Department of Physics. Stockholm University, Faculty of Science, The Oskar Klein Centre for Cosmo Particle Physics (OKC).
    Shaikh, Nabila W.
    Stockholm University, Faculty of Science, Department of Physics. Stockholm University, Faculty of Science, The Oskar Klein Centre for Cosmo Particle Physics (OKC).
    Silverstein, Samuel B.
    Stockholm University, Faculty of Science, Department of Physics.
    Sjölin, Jörgen
    Stockholm University, Faculty of Science, Department of Physics. Stockholm University, Faculty of Science, The Oskar Klein Centre for Cosmo Particle Physics (OKC).
    Strandberg, Sara
    Stockholm University, Faculty of Science, Department of Physics. Stockholm University, Faculty of Science, The Oskar Klein Centre for Cosmo Particle Physics (OKC).
    Valdés Santurio, Eduardo
    Stockholm University, Faculty of Science, Department of Physics. Stockholm University, Faculty of Science, The Oskar Klein Centre for Cosmo Particle Physics (OKC).
    Wallängen, Veronica
    Stockholm University, Faculty of Science, Department of Physics. Stockholm University, Faculty of Science, The Oskar Klein Centre for Cosmo Particle Physics (OKC).
    Measurement of the azimuthal anisotropy of charged-particle production in Xe plus Xe collisions at root S-NN=5.44 TeV with the ATLAS detector2020In: Physical Review C: Covering Nuclear Physics, ISSN 2469-9985, E-ISSN 2469-9993, Vol. 101, no 2, article id 024906Article in journal (Refereed)
    Abstract [en]

    This paper describes the measurements of flow harmonics v(2)-v(6) in 3 mu b(-1) of Xe Xe collisions at root S-NN = 5.44 TeV performed using the ATLAS detector at the Large Hadron Collider (LHC). Measurements of the centrality, multiplicity, and p(T) dependence of the v(n) obtained using two-particle correlations and the scalar product technique are presented. The measurements are also performed using a template-fit procedure, which was developed to remove nonflow correlations in small collision systems. This nonflow removal is shown to have a significant influence on the measured v(n) at high p(T), especially in peripheral events. Comparisons of the measured v(n) with measurements in Pb + Pb collisions and p + Pb collisions at root S-NN = 5.02 TeV are also presented. The v(n) values in Xe + Xe collisions are observed to be larger than those in Pb + Pb collisions for n = 2, 3, and 4 in the most central events. However, with decreasing centrality or increasing harmonic order n, the v(n) values in Xe + Xe collisions become smaller than those in Pb + Pb collisions. The v(n) in Xe + Xe and Pb + Pb collisions are also compared as a function of the mean number of participating nucleons, < N-part >, and the measured charged-particle multiplicity in the detector. The v(3) values in Xe + Xe and Pb + Pb collisions are observed to be similar at the same < N-part > or multiplicity, but the other harmonics are significantly different. The ratios of the measured v(n) in Xe + Xe and Pb + Pb collisions, as a function of centrality, are also compared to theoretical calculations.

  • 23. Badran, H.
    et al.
    Scholey, C.
    Uusitalo, J.
    Auranen, K.
    Grahn, T.
    Greenlees, P. T.
    Herzan, A.
    Jakobsson, Ulrika
    KTH, School of Engineering Sciences (SCI), Physics.
    Julin, R.
    Juutinen, S.
    Konki, J.
    Leino, M.
    Mallaburn, M. J.
    Pakarinen, J.
    Papadakis, P.
    Partanen, J.
    Peura, P.
    Rahkila, P.
    Sandzelius, M.
    Saren, J.
    Sorri, J.
    Stolze, S.
    Decay spectroscopy of Pb-179(82)97 and evidence for a 9/2(-) intruder state in Tl-179(81)982017In: Physical Review C: Covering Nuclear Physics, ISSN 2469-9985, E-ISSN 2469-9993, Vol. 96, no 6, article id 064314Article in journal (Refereed)
    Abstract [en]

    The very neutron-deficient isobars Pb-179 and Tl-179 have been produced using the fusion-evaporation reactions Pd-104(Kr-78,xpyn), where x <= 1 and y >= 2. The gas-filled separator RITU was employed to transport and separate the recoiling nuclei of interest from the scattered beam and unwanted products. The GREAT spectrometer was used to study the decay properties through alpha-alpha and alpha-gamma correlations, which has allowed the ground state of Pb-179 to be assigned as I-pi = 9/2(-). The decay of Pb-179 was measured to have an alpha-particle energy and half-life of E-alpha = 7348(5) keV and t(1/2) = 2.7(2) ms, respectively. A search for a nu i(13/2) state in Pb-179 was performed, but only a limit of excitation energy and half-life was obtained. In Tl-179 a t(1/2) = 114(-10)(+18) ns isomeric state, likely at an excitation energy of 904.5(9) keV, was identified and is tentatively assigned to be a 9/2(-) proton intruder state.

  • 24.
    Bertoli, Gabriele
    et al.
    Stockholm University, Faculty of Science, Department of Physics. Stockholm University, Faculty of Science, The Oskar Klein Centre for Cosmo Particle Physics (OKC).
    Bessidskaia Bylund, Olga
    Stockholm University, Faculty of Science, Department of Physics. Stockholm University, Faculty of Science, The Oskar Klein Centre for Cosmo Particle Physics (OKC).
    Bohm, Christian
    Stockholm University, Faculty of Science, Department of Physics.
    Carney, Rebecca M. D.
    Stockholm University, Faculty of Science, Department of Physics. Stockholm University, Faculty of Science, The Oskar Klein Centre for Cosmo Particle Physics (OKC).
    Carney, Rebecca M. D.
    Stockholm University, Faculty of Science, Department of Physics. Stockholm University, Faculty of Science, The Oskar Klein Centre for Cosmo Particle Physics (OKC).
    Gellerstedt, Karl
    Stockholm University, Faculty of Science, Department of Physics. Stockholm University, Faculty of Science, The Oskar Klein Centre for Cosmo Particle Physics (OKC).
    Hellman, Sten
    Stockholm University, Faculty of Science, Department of Physics. Stockholm University, Faculty of Science, The Oskar Klein Centre for Cosmo Particle Physics (OKC).
    Jon-And, Kerstin
    Stockholm University, Faculty of Science, Department of Physics. Stockholm University, Faculty of Science, The Oskar Klein Centre for Cosmo Particle Physics (OKC).
    Milstead, David A.
    Stockholm University, Faculty of Science, Department of Physics. Stockholm University, Faculty of Science, The Oskar Klein Centre for Cosmo Particle Physics (OKC).
    Moa, Torbjörn
    Stockholm University, Faculty of Science, Department of Physics. Stockholm University, Faculty of Science, The Oskar Klein Centre for Cosmo Particle Physics (OKC).
    Molander, Simon
    Stockholm University, Faculty of Science, Department of Physics. Stockholm University, Faculty of Science, The Oskar Klein Centre for Cosmo Particle Physics (OKC).
    Pasuwan, Patrawan
    Stockholm University, Faculty of Science, Department of Physics. Stockholm University, Faculty of Science, The Oskar Klein Centre for Cosmo Particle Physics (OKC).
    Shaikh, Nabila W.
    Stockholm University, Faculty of Science, Department of Physics. Stockholm University, Faculty of Science, The Oskar Klein Centre for Cosmo Particle Physics (OKC).
    Silverstein, Samuel B.
    Stockholm University, Faculty of Science, Department of Physics.
    Sjölin, Jörgen
    Stockholm University, Faculty of Science, Department of Physics. Stockholm University, Faculty of Science, The Oskar Klein Centre for Cosmo Particle Physics (OKC).
    Strandberg, Sara
    Stockholm University, Faculty of Science, Department of Physics. Stockholm University, Faculty of Science, The Oskar Klein Centre for Cosmo Particle Physics (OKC).
    Ughetto, Michaël
    Stockholm University, Faculty of Science, Department of Physics. Stockholm University, Faculty of Science, The Oskar Klein Centre for Cosmo Particle Physics (OKC).
    Valdes Santurio, Eduardo
    Stockholm University, Faculty of Science, Department of Physics. Stockholm University, Faculty of Science, The Oskar Klein Centre for Cosmo Particle Physics (OKC).
    Wallängen, Veronica
    Stockholm University, Faculty of Science, Department of Physics. Stockholm University, Faculty of Science, The Oskar Klein Centre for Cosmo Particle Physics (OKC).
    Measurement of the suppression and azimuthal anisotropy of muons from heavy-flavor decays in Pb plus Pb collisions at root s(NN)=2.76 TeV with the ATLAS detector2018In: Physical Review C: Covering Nuclear Physics, ISSN 2469-9985, E-ISSN 2469-9993, Vol. 98, no 4, article id 044905Article in journal (Refereed)
    Abstract [en]

    ATLAS measurements of the production of muons from heavy-flavor decays in root s(NN) = 2.76 TeV Pb+Pb collisions and root s = 2.76 TeV pp collisions at the LHC are presented. Integrated luminosities of 0.14 nb(-1) and 570 nb(-1) are used for the Pb+Pb and pp measurements, respectively, which are performed over the muon transverse momentum range 4 < pT < 14 GeV and for five Pb+Pb centrality intervals. Backgrounds arising from in-flight pion and kaon decays, hadronic showers, and misreconstructed muons are statistically removed using a template-fitting procedure. The heavy-flavor muon differential cross sections and per-event yields are measured in pp and Pb+Pb collisions, respectively. The nuclear modification factor R-AA obtained from these is observed to be independent of pT, within uncertainties, and to be less than unity, which indicates suppressed production of heavy-flavor muons in Pb+Pb collisions. For the 10% most central Pb+Pb events, the measured R-AA is approximately 0.35. The azimuthal modulation of the heavy-flavor muon yields is also measured and the associated Fourier coefficients v(n) for n = 2, 3, and 4 are given as a function of pT and centrality. They vary slowly with pT and show a systematic variation with centrality which is characteristic of other anisotropy measurements, such as that observed for inclusive hadrons. The measured R-AA and v(n) values are also compared with theoretical calculations.

  • 25.
    Bertoli, Gabriele
    et al.
    Stockholm University, Faculty of Science, Department of Physics. Stockholm University, Faculty of Science, The Oskar Klein Centre for Cosmo Particle Physics (OKC).
    Bessidskaia Bylund, Olga
    Stockholm University, Faculty of Science, Department of Physics. Stockholm University, Faculty of Science, The Oskar Klein Centre for Cosmo Particle Physics (OKC).
    Bohm, Christian
    Stockholm University, Faculty of Science, Department of Physics.
    Carney, Rebecca M. D.
    Stockholm University, Faculty of Science, Department of Physics. Stockholm University, Faculty of Science, The Oskar Klein Centre for Cosmo Particle Physics (OKC).
    Clément, Christophe
    Stockholm University, Faculty of Science, Department of Physics. Stockholm University, Faculty of Science, The Oskar Klein Centre for Cosmo Particle Physics (OKC).
    Gellerstedt, Karl
    Stockholm University, Faculty of Science, Department of Physics. Stockholm University, Faculty of Science, The Oskar Klein Centre for Cosmo Particle Physics (OKC).
    Hellman, Sten
    Stockholm University, Faculty of Science, Department of Physics. Stockholm University, Faculty of Science, The Oskar Klein Centre for Cosmo Particle Physics (OKC).
    Jon-And, Kerstin
    Stockholm University, Faculty of Science, Department of Physics. Stockholm University, Faculty of Science, The Oskar Klein Centre for Cosmo Particle Physics (OKC).
    Milstead, David A.
    Stockholm University, Faculty of Science, Department of Physics. Stockholm University, Faculty of Science, The Oskar Klein Centre for Cosmo Particle Physics (OKC).
    Moa, Torbjörn
    Stockholm University, Faculty of Science, Department of Physics. Stockholm University, Faculty of Science, The Oskar Klein Centre for Cosmo Particle Physics (OKC).
    Molander, Simon
    Stockholm University, Faculty of Science, Department of Physics. Stockholm University, Faculty of Science, The Oskar Klein Centre for Cosmo Particle Physics (OKC).
    Pasuwan, Patrawan
    Stockholm University, Faculty of Science, Department of Physics. Stockholm University, Faculty of Science, The Oskar Klein Centre for Cosmo Particle Physics (OKC).
    Shaikh, Nabila W.
    Stockholm University, Faculty of Science, Department of Physics. Stockholm University, Faculty of Science, The Oskar Klein Centre for Cosmo Particle Physics (OKC).
    Silverstein, Samuel B.
    Stockholm University, Faculty of Science, Department of Physics.
    Sjölin, Jörgen
    Stockholm University, Faculty of Science, Department of Physics. Stockholm University, Faculty of Science, The Oskar Klein Centre for Cosmo Particle Physics (OKC).
    Strandberg, Sara
    Stockholm University, Faculty of Science, Department of Physics. Stockholm University, Faculty of Science, The Oskar Klein Centre for Cosmo Particle Physics (OKC).
    Ughetto, Michaël
    Stockholm University, Faculty of Science, Department of Physics. Stockholm University, Faculty of Science, The Oskar Klein Centre for Cosmo Particle Physics (OKC).
    Valdes Santurio, Eduardo
    Stockholm University, Faculty of Science, Department of Physics. Stockholm University, Faculty of Science, The Oskar Klein Centre for Cosmo Particle Physics (OKC).
    Wallängen, Veronica
    Stockholm University, Faculty of Science, Department of Physics. Stockholm University, Faculty of Science, The Oskar Klein Centre for Cosmo Particle Physics (OKC).
    Measurement of jet fragmentation in Pb plus Pb and pp collisions at root S-NN=5.02 TeV with the ATLAS detector2018In: Physical Review C: Covering Nuclear Physics, ISSN 2469-9985, E-ISSN 2469-9993, Vol. 98, no 2, article id 024908Article in journal (Refereed)
    Abstract [en]

    This paper presents a measurement of jet fragmentation functions in 0.49 nb(-1) of Pb +Pb collisions and 25 pb(-1) of pp collisions at root S-NN = 5.02 TeV collected in 2015 with the ATLAS detector at the LHC. These measurements provide insight into the jet quenching process in the quark-gluon plasma created in the aftermath of ultrarelativistic collisions between two nuclei. The modifications to the jet fragmentation functions are quantified by dividing the measurements in Pb+Pb collisions by baseline measurements in pp collisions. This ratio is studied as a function of the transverse momentum of the jet, the jet rapidity, and the centrality of the collision. In both collision systems, the jet fragmentation functions are measured for jets with transverse momentum between 126 and 398 GeV and with an absolute value of jet rapidity less than 2.1. An enhancement of particles carrying a small fraction of the jet momentum is observed, which increases with centrality and with increasing jet transverse momentum. Yields of particles carrying a very large fraction of the jet momentum are also observed to be enhanced. Between these two enhancements of the fragmentation functions a suppression of particles carrying an intermediate fraction of the jet momentum is observed in Pb+Pb collisions. A small dependence of the modifications on jet rapidity is observed.

  • 26.
    Bertoli, Gabriele
    et al.
    Stockholm University, Faculty of Science, Department of Physics. Stockholm University, Faculty of Science, The Oskar Klein Centre for Cosmo Particle Physics (OKC).
    Bohm, Christian
    Stockholm University, Faculty of Science, Department of Physics.
    Carney, Rebecca M. D.
    Stockholm University, Faculty of Science, Department of Physics. Stockholm University, Faculty of Science, The Oskar Klein Centre for Cosmo Particle Physics (OKC).
    Clément, Christophe
    Stockholm University, Faculty of Science, Department of Physics. Stockholm University, Faculty of Science, The Oskar Klein Centre for Cosmo Particle Physics (OKC).
    Hellman, Sten
    Stockholm University, Faculty of Science, Department of Physics. Stockholm University, Faculty of Science, The Oskar Klein Centre for Cosmo Particle Physics (OKC).
    Jon-And, Kerstin
    Stockholm University, Faculty of Science, Department of Physics. Stockholm University, Faculty of Science, The Oskar Klein Centre for Cosmo Particle Physics (OKC).
    Kastanas, Alexandros
    Stockholm University, Faculty of Science, Department of Physics. Stockholm University, Faculty of Science, The Oskar Klein Centre for Cosmo Particle Physics (OKC).
    Milstead, David A.
    Stockholm University, Faculty of Science, Department of Physics. Stockholm University, Faculty of Science, The Oskar Klein Centre for Cosmo Particle Physics (OKC).
    Moa, Torbjörn
    Stockholm University, Faculty of Science, Department of Physics. Stockholm University, Faculty of Science, The Oskar Klein Centre for Cosmo Particle Physics (OKC).
    Pasuwan, Patrawan
    Stockholm University, Faculty of Science, Department of Physics. Stockholm University, Faculty of Science, The Oskar Klein Centre for Cosmo Particle Physics (OKC).
    Shaikh, Nabila W.
    Stockholm University, Faculty of Science, Department of Physics. Stockholm University, Faculty of Science, The Oskar Klein Centre for Cosmo Particle Physics (OKC).
    Silverstein, Samuel B.
    Stockholm University, Faculty of Science, Department of Physics.
    Sjölin, Jörgen
    Stockholm University, Faculty of Science, Department of Physics. Stockholm University, Faculty of Science, The Oskar Klein Centre for Cosmo Particle Physics (OKC).
    Strandberg, Sara
    Stockholm University, Faculty of Science, Department of Physics. Stockholm University, Faculty of Science, The Oskar Klein Centre for Cosmo Particle Physics (OKC).
    Ughetto, Michaël
    Stockholm University, Faculty of Science, Department of Physics. Stockholm University, Faculty of Science, The Oskar Klein Centre for Cosmo Particle Physics (OKC).
    Valdes Santurio, Eduardo
    Stockholm University, Faculty of Science, Department of Physics. Stockholm University, Faculty of Science, The Oskar Klein Centre for Cosmo Particle Physics (OKC).
    Wallängen, Veronica
    Stockholm University, Faculty of Science, Department of Physics. Stockholm University, Faculty of Science, The Oskar Klein Centre for Cosmo Particle Physics (OKC).
    Dijet azimuthal correlations and conditional yields in pp and p plus Pb collisions ats root S-NN=5.02 TeV with the ATLAS detector2019In: Physical Review C: Covering Nuclear Physics, ISSN 2469-9985, E-ISSN 2469-9993, Vol. 100, no 3, article id 034903Article in journal (Refereed)
    Abstract [en]

    This paper presents a measurement of forward-forward and forward-central dijet azimuthal angular correlations and conditional yields in proton-proton (pp) and proton-lead (p + Pb) collisions as a probe of the nuclear gluon density in regions where the fraction of the average momentum per nucleon carried by the parton entering the hard scattering is low. In these regions, gluon saturation can modify the rapidly increasing parton distribution function of the gluon. The analysis utilizes 25 pb(-1) of pp data and 360 mu b(-1) of p + Pb data, both at root S-NN = 5.02 TeV, collected in 2015 and 2016, respectively, with the ATLAS detector at the Large Hadron Collider. The measurement is performed in the center-of-mass frame of the nucleon-nucleon system in the rapidity range between -4.0 and 4.0 using the two highest transverse-momentum jets in each event, with the highest transverse-momentum jet restricted to the forward rapidity range. No significant broadening of azimuthal angular correlations is observed for forward-forward or forward-central dijets in p + Pb compared to pp collisions. For forward-forward jet pairs in the proton-going direction, the ratio of conditional yields in p + Pb collisions to those in pp collisions is suppressed by approximately 20%, with no significant dependence on the transverse momentum of the dijet system. No modification of conditional yields is observed for forward-central dijets.

  • 27.
    Bhagwat, Ameeya
    et al.
    KTH, School of Engineering Sciences (SCI), Physics, Nuclear Physics. UM-DAE Centre for Excellence in Basic Sciences, India.
    Liotta, Roberto
    KTH, School of Engineering Sciences (SCI), Physics, Nuclear Physics.
    Cluster decay in the superallowed alpha decay region2017In: Physical Review C: Covering Nuclear Physics, ISSN 2469-9985, E-ISSN 2469-9993, Vol. 96, no 3, article id 031302Article in journal (Refereed)
    Abstract [en]

    The emissions of a particles and protons are the dominant decay channels in the neutron-deficient nuclei corresponding to the sdg major shell. The possibility of cluster emission is explored here. It is shown that the cluster decay mode has a small yet sizable branching ratio.

  • 28.
    Biswas, S.
    et al.
    CNRS, GANIL, CEA, IN2P3,DRF, Bd Henri Becquerel,BP 55027, F-14076 Caen 5, France..
    Lemasson, A.
    CNRS, GANIL, CEA, IN2P3,DRF, Bd Henri Becquerel,BP 55027, F-14076 Caen 5, France..
    Rejmund, M.
    CNRS, GANIL, CEA, IN2P3,DRF, Bd Henri Becquerel,BP 55027, F-14076 Caen 5, France..
    Navin, A.
    CNRS, GANIL, CEA, IN2P3,DRF, Bd Henri Becquerel,BP 55027, F-14076 Caen 5, France..
    Kim, Y. H.
    CNRS, GANIL, CEA, IN2P3,DRF, Bd Henri Becquerel,BP 55027, F-14076 Caen 5, France.;Inst Laue Langevin, F-38042 Grenoble, France..
    Michelagnoli, C.
    CNRS, GANIL, CEA, IN2P3,DRF, Bd Henri Becquerel,BP 55027, F-14076 Caen 5, France.;Inst Laue Langevin, F-38042 Grenoble, France..
    Stefan, I
    Univ Paris Saclay, Univ Paris Sud, Inst Phys Nucl, IN2P3,CNRS, F-91406 Orsay, France..
    Banik, R.
    Variable Energy Cyclotron Ctr, 1-AF Bidhan Nagar, Kolkata 700064, India.;Homi Bhabha Natl Inst, Training Sch Complex, Mumbai 400094, Maharashtra, India..
    Bednarczyk, P.
    Inst Nucl Phys PAN, Krakow, Poland..
    Bhattacharya, S.
    Variable Energy Cyclotron Ctr, 1-AF Bidhan Nagar, Kolkata 700064, India.;Homi Bhabha Natl Inst, Training Sch Complex, Mumbai 400094, Maharashtra, India..
    Bhattacharyya, S.
    Variable Energy Cyclotron Ctr, 1-AF Bidhan Nagar, Kolkata 700064, India.;Homi Bhabha Natl Inst, Training Sch Complex, Mumbai 400094, Maharashtra, India..
    Clement, E.
    CNRS, GANIL, CEA, IN2P3,DRF, Bd Henri Becquerel,BP 55027, F-14076 Caen 5, France..
    Crawford, H. L.
    Lawrence Berkeley Natl Lab, Nucl Sci Div, Berkeley, CA 94720 USA..
    de France, G.
    CNRS, GANIL, CEA, IN2P3,DRF, Bd Henri Becquerel,BP 55027, F-14076 Caen 5, France..
    Fallon, P.
    Lawrence Berkeley Natl Lab, Nucl Sci Div, Berkeley, CA 94720 USA..
    Fremont, G.
    CNRS, GANIL, CEA, IN2P3,DRF, Bd Henri Becquerel,BP 55027, F-14076 Caen 5, France..
    Goupil, J.
    CNRS, GANIL, CEA, IN2P3,DRF, Bd Henri Becquerel,BP 55027, F-14076 Caen 5, France..
    Jacquot, B.
    CNRS, GANIL, CEA, IN2P3,DRF, Bd Henri Becquerel,BP 55027, F-14076 Caen 5, France..
    Li, H. J.
    CNRS, GANIL, CEA, IN2P3,DRF, Bd Henri Becquerel,BP 55027, F-14076 Caen 5, France..
    Ljungvall, J.
    Univ Paris Saclay, Univ Paris Sud, CSNSM, CNRS,IN2P3, F-91405 Orsay, France..
    Maj, A.
    Inst Nucl Phys PAN, Krakow, Poland..
    Menager, A.
    CNRS, GANIL, CEA, IN2P3,DRF, Bd Henri Becquerel,BP 55027, F-14076 Caen 5, France..
    More, V
    CNRS, GANIL, CEA, IN2P3,DRF, Bd Henri Becquerel,BP 55027, F-14076 Caen 5, France..
    Palit, R.
    Tata Inst Fundamental Res, Dept Nucl & Atom Phys, Mumbai 400005, Maharashtra, India..
    Perez-Vidal, R. M.
    Univ Valencia, CSIC, Inst Fis Corpuscular, E-46980 Valencia, Spain..
    Ropert, J.
    CNRS, GANIL, CEA, IN2P3,DRF, Bd Henri Becquerel,BP 55027, F-14076 Caen 5, France..
    Barrientos, D.
    CERN, CH-1211 Geneva 23, Switzerland..
    Benzoni, G.
    Ist Nazl Fis Nucl, Sez Milano, Milan, Italy..
    Birkenbach, B.
    Univ Cologne, Inst Kernphys, Zulpicher Str 77, D-50937 Cologne, Germany..
    Boston, A. J.
    Univ Liverpool, Oliver Lodge Lab, Liverpool L69 7ZE, Merseyside, England..
    Boston, H. C.
    Univ Liverpool, Oliver Lodge Lab, Liverpool L69 7ZE, Merseyside, England..
    Cederwall, Bo
    KTH, School of Engineering Sciences (SCI), Physics.
    Collado, J.
    Univ Valencia, Dept Ingn Elect, Valencia, Spain..
    Cullen, D. M.
    Univ Manchester, Schuster Lab, Nucl Phys Grp, Manchester M13 9PL, Lancs, England..
    Desesquelles, P.
    Univ Paris Saclay, Univ Paris Sud, CSNSM, CNRS,IN2P3, F-91405 Orsay, France..
    Domingo-Pardo, C.
    Univ Valencia, CSIC, Inst Fis Corpuscular, E-46980 Valencia, Spain..
    Dudouet, J.
    Univ Paris Saclay, Univ Paris Sud, CSNSM, CNRS,IN2P3, F-91405 Orsay, France.;Univ Lyon 1, Univ Lyon, CNRS, IN2P3,UMR5822,IPNL, 4 Rue Enrico Fermi, F-69622 Villeurbanne, France..
    Eberth, J.
    Univ Cologne, Inst Kernphys, Zulpicher Str 77, D-50937 Cologne, Germany..
    Gonzalez, V
    Univ Valencia, Dept Ingn Elect, Valencia, Spain..
    Harkness-Brennan, L. J.
    Univ Liverpool, Oliver Lodge Lab, Liverpool L69 7ZE, Merseyside, England..
    Hess, H.
    Univ Cologne, Inst Kernphys, Zulpicher Str 77, D-50937 Cologne, Germany..
    Jungclaus, A.
    CSIC, Inst Estruct Mat, E-28006 Madrid, Spain..
    Korten, W.
    CEA, DRF, IRFU, Ctr CEA Saclay, F-91191 Gif Sur Yvette, France..
    Labiche, M.
    STFC Daresbury Lab, Warrington WA4 4AD, Cheshire, England..
    Lefevre, A.
    CNRS, GANIL, CEA, IN2P3,DRF, Bd Henri Becquerel,BP 55027, F-14076 Caen 5, France..
    Menegazzo, R.
    Ist Nazl Fis Nucl, Sez Padova, I-35131 Padua, Italy..
    Mengoni, D.
    Ist Nazl Fis Nucl, Sez Padova, I-35131 Padua, Italy.;Univ Padua, Dipartimento Fis & Astron, I-35131 Padua, Italy..
    Million, B.
    Ist Nazl Fis Nucl, Sez Milano, Milan, Italy..
    Napoli, D. R.
    Ist Nazl Fis Nucl, Lab Nazl Legnaro, Via Romea 4, I-35020 Legnaro, Italy..
    Pullia, A.
    Ist Nazl Fis Nucl, Sez Milano, Milan, Italy.;Univ Milan, Dipartimento Fis, I-20133 Milan, Italy..
    Quintana, B.
    Univ Salamanca, Lab Radiac Ionizantes, E-37008 Salamanca, Spain..
    Ralet, D.
    Univ Paris Saclay, Univ Paris Sud, CSNSM, CNRS,IN2P3, F-91405 Orsay, France.;Tech Univ Darmstadt, Inst Kernphys, D-64289 Darmstadt, Germany.;Helmholtzzentrum Schwerionenforsch GmbH, GSI, D-64291 Darmstadt, Germany..
    Recchia, F.
    Ist Nazl Fis Nucl, Sez Padova, I-35131 Padua, Italy.;Univ Padua, Dipartimento Fis & Astron, I-35131 Padua, Italy..
    Reiter, P.
    Univ Cologne, Inst Kernphys, Zulpicher Str 77, D-50937 Cologne, Germany..
    Saillant, F.
    CNRS, GANIL, CEA, IN2P3,DRF, Bd Henri Becquerel,BP 55027, F-14076 Caen 5, France..
    Salsac, M. D.
    CEA, DRF, IRFU, Ctr CEA Saclay, F-91191 Gif Sur Yvette, France..
    Sanchis, E.
    Univ Valencia, Dept Ingn Elect, Valencia, Spain..
    Stezowski, O.
    Univ Lyon 1, Univ Lyon, CNRS, IN2P3,UMR5822,IPNL, 4 Rue Enrico Fermi, F-69622 Villeurbanne, France..
    Theisen, Ch
    CEA, DRF, IRFU, Ctr CEA Saclay, F-91191 Gif Sur Yvette, France..
    Valiente-Dobon, J. J.
    Ist Nazl Fis Nucl, Lab Nazl Legnaro, Via Romea 4, I-35020 Legnaro, Italy..
    Zielinska, M.
    CEA, DRF, IRFU, Ctr CEA Saclay, F-91191 Gif Sur Yvette, France..
    Effects of one valence proton on seniority and angular momentum of neutrons in neutron-rich(51)( 122-)(131)Sb isotopes2019In: Physical Review C: Covering Nuclear Physics, ISSN 2469-9985, E-ISSN 2469-9993, Vol. 99, no 6, article id 064302Article in journal (Refereed)
    Abstract [en]

    Background: Levels fulfilling the seniority scheme and relevant isomers are commonly observed features in semimagic nuclei; for example, in Sn isotopes (Z = 50). Seniority isomers in Sn, with dominantly pure neutron configurations, directly probe the underlying neutron-neutron (vv) interaction. Furthermore, an addition of a valence proton particle or hole, through neutron-proton (v pi) interaction, affects the neutron seniority as well as the angular momentum. Purpose: Benchmark the reproducibility of the experimental observables, like the excitation energies (E-x) and the reduced electric-quadrupole transition probabilities [B(E2)], with the results obtained from shell-model interactions for neutron-rich Sn and Sb isotopes with N < 82. Study the sensitivity of the aforementioned experimental observables to the model interaction components. Furthermore, explore from a microscopic point of view the structural similarity between the isomers in Sn and Sb, and thus the importance of the valence proton. Methods: The neutron-rich Sb122-131 isotopes were produced as fission fragments in the reaction Be-9(U-238, f) with 6.2 MeV/u beam energy. A unique setup, consisting of AGATA, VAMOS++, and EXOGAM detectors, was used which enabled the prompt-delayed gamma-ray spectroscopy of fission fragments in the time range of 100 ns to 200 mu s. Results: New isomers and prompt and delayed transitions were established in the even-A Sb122-131 isotopes. In the odd-A Sb122-131 isotopes, new prompt and delayed gamma-ray transitions were identified, in addition to the confirmation of the previously known isomers. The half-lives of the isomeric states and the B(E2) transition probabilities of the observed transitions depopulating these isomers were extracted. Conclusions: The experimental data was compared with the theoretical results obtained in the framework of large-scale shell-model (LSSM) calculations in a restricted model space. Modifications of several components of the shell-model interaction were introduced to obtain a consistent agreement with the excitation energies and the B(E2) transition probabilities in neutron-rich Sn and Sb isotopes. The isomeric configurations in Sn and Sb were found to be relatively pure. Furthermore, the calculations revealed that the presence of a single valence proton, mainly in the g(7/2) orbital in Sb isotopes, leads to significant mixing (due to the v pi interaction) of (i) the neutron seniorities (upsilon(v)) and (ii) the neutron angular momentum (I-v). The above features have a weak impact on the excitation energies, but have an important impact on the B(E2) transition probabilities. In addition, a constancy of the relative excitation energies irrespective of neutron seniority and neutron number in Sn and Sb was observed.

  • 29.
    Cai, Boshuai
    et al.
    Sun Yat Sen Univ, Sino French Inst Nucl Engn & Technol, Zhuhai 519082, Guangdong, Peoples R China..
    Chen, Guangshang
    Sun Yat Sen Univ, Sino French Inst Nucl Engn & Technol, Zhuhai 519082, Guangdong, Peoples R China..
    Xu, Jiongyu
    Sun Yat Sen Univ, Sino French Inst Nucl Engn & Technol, Zhuhai 519082, Guangdong, Peoples R China..
    Yuan, Cenxi
    Sun Yat Sen Univ, Sino French Inst Nucl Engn & Technol, Zhuhai 519082, Guangdong, Peoples R China..
    Qi, Chong
    KTH, School of Engineering Sciences (SCI), Physics. KTH, School of Biotechnology (BIO), Centres, Albanova VinnExcellence Center for Protein Technology, ProNova.
    Yao, Yuan
    Beijing Normal Univ, Coll Nucl Sci & Technol, Beijing 100875, Peoples R China..
    alpha decay half-life estimation and uncertainty analysis2020In: Physical Review C: Covering Nuclear Physics, ISSN 2469-9985, E-ISSN 2469-9993, Vol. 101, no 5, article id 054304Article in journal (Refereed)
    Abstract [en]

    Background: alpha decay is one of the most important decay modes of atomic nuclei. The half-life of alpha decay provides valuable information for nuclear structure study. Many theoretical models and empirical formulas have been suggested to describe the half-life of alpha decay as a function of decay energy (Q(alpha)), atomic number (Z), nucleon number (A), and other related variables. However, the analysis of theoretical uncertainty is rarely done for those alpha decay models. Purpose: We aim to perform a systematic and detailed study on the theoretical uncertainty of existing alpha decay formulas based on statistical methods. Methods: The nonparametric bootstrap method is used to evaluate the uncertainties of two alpha decay formulas, the universal decay law (UDL) and the new Geiger-Nuttall law (NGNL). Such a method can simultaneously obtain the uncertainty of each parameter, the correlation between each pair of parameters, and the total, statistical, and systematic uncertainties of each formula. Both even-even (ee) nuclei and odd-A (oA) nuclei are used in the analysis. The collected data are separated into three parts: ee nuclei, oA nuclei without spin or parity change (oA_nc), and oA nuclei with spin and/or parity change (oA_c). Based on the residues between observed data and corresponding calculations, the statistical and systematic uncertainties are decomposed from the total uncertainty, from which one can clarify the effects from the shell structure, pairing, and angular momentum change on describing alpha decay half-life. Results: If N > 126 and N <= 126 nuclei are considered together, the systematic uncertainty of residues between observed and predicted half-lives are larger than if those groups are considered separately. Without a shell correction term, a much larger systematic uncertainty is found if parameters obtained for N <= 126 nuclei are used to describe the half-lives of N > 126 nuclei. Based on the Bohr-Sommerfeld quantization condition and simple assumptions, a detailed shell correction term is obtained for N > 126 nuclei, for which the value is similar to that in NGNL. A global hindrance on the alpha decay process is found in oA_nc (oA_c) nuclei compared with ee (oA_nc) nuclei. If parameters obtained from ee (oA_nc) nuclei are used, the half-lives of oA_nc (oA_c) nuclei are generally underestimated with large systematic uncertainties, which can be related to the contribution of pairing effect and angular momentum. The parameter of angular momentum term in NGNL is obtained with large uncertainty and very sensitive to the selections of the dataset. The recently observed superallowed decay from Te-104 to Sn-100 is also discussed based on uncertainty analysis. Conclusions: The theoretical uncertainty of existing alpha decay formulas is successfully evaluated by the nonparametric bootstrap method, which simultaneously indicates the important effect in alpha decay, such as the shell effect and the pairing effect. In addition, statistical results show strong correlations between the parameters of the second and third terms in both UDL and NGNL, which demands further investigations.

  • 30.
    Ciemala, M.
    et al.
    Inst Nucl Phys, PAN, PL-31342 Krakow, Poland..
    Atac Nyberg, Ayse
    KTH, School of Engineering Sciences (SCI), Physics, Nuclear Physics.
    Cederwall, Bo
    KTH, School of Engineering Sciences (SCI), Physics, Nuclear Physics.
    Simonis, J.
    Johannes Gutenberg Univ Mainz, Inst Kernphys & PRISMA Cluster Excellence, D-55128 Mainz, Germany..
    Testing ab initio nuclear structure in neutron-rich nuclei: Lifetime measurements of second 2(+) state in C-16 and O-202020In: Physical Review C: Covering Nuclear Physics, ISSN 2469-9985, E-ISSN 2469-9993, Vol. 101, no 2, article id 021303Article in journal (Refereed)
    Abstract [en]

    To test the predictive power of ab initio nuclear structure theory, the lifetime of the second 2(+) state in neutron-rich O-20, tau(2(2)(+)) = 150(-30)(+80) fs, and an estimate for the lifetime of the second 2(+) state in C-16 have been obtained for the first time. The results were achieved via a novel Monte Carlo technique that allowed us to measure nuclear state lifetimes in the tens-to-hundreds of femtoseconds range by analyzing the Doppler-shifted gamma-transition line shapes of products of low-energy transfer and deep-inelastic processes in the reaction O-18 (7.0 MeV/u) + Ta-181. The requested sensitivity could only be reached owing to the excellent performances of the Advanced gamma-Tracking Array AGATA, coupled to the PARIS scintillator array and to the VAMOS++ magnetic spectrometer. The experimental lifetimes agree with predictions of ab initio calculations using two- and three-nucleon interactions, obtained with the valence-space in-medium similarity renormalization group for O-20 and with the no-core shell model for C-16. The present measurement shows the power of electromagnetic observables, determined with high-precision gamma spectroscopy, to assess the quality of first-principles nuclear structure calculations, complementing common benchmarks based on nuclear energies. The proposed experimental approach will be essential for short lifetime measurements in unexplored regions of the nuclear chart, including r-process nuclei, when intense beams, produced by Isotope Separation On-Line (ISOL) techniques, become available.

  • 31.
    Ciemala, M.
    et al.
    Inst Nucl Phys, PAN, PL-31342 Krakow, Poland.
    Ziliani, S.
    Univ Milan, Dipartimento Fis, I-20133 Milan, Italy;Ist Nazl Fis Nucl, Sez Milano, Via Celoria 16, I-20133 Milan, Italy.
    Crespi, F. C. L.
    Univ Milan, Dipartimento Fis, I-20133 Milan, Italy;Ist Nazl Fis Nucl, Sez Milano, Via Celoria 16, I-20133 Milan, Italy.
    Leoni, S.
    Univ Milan, Dipartimento Fis, I-20133 Milan, Italy;Ist Nazl Fis Nucl, Sez Milano, Via Celoria 16, I-20133 Milan, Italy.
    Fornal, B.
    Inst Nucl Phys, PAN, PL-31342 Krakow, Poland.
    Maj, A.
    Inst Nucl Phys, PAN, PL-31342 Krakow, Poland.
    Bednarczyk, P.
    Inst Nucl Phys, PAN, PL-31342 Krakow, Poland.
    Benzoni, G.
    Ist Nazl Fis Nucl, Sez Milano, Via Celoria 16, I-20133 Milan, Italy.
    Bracco, A.
    Univ Milan, Dipartimento Fis, I-20133 Milan, Italy;Ist Nazl Fis Nucl, Sez Milano, Via Celoria 16, I-20133 Milan, Italy.
    Boiano, C.
    Ist Nazl Fis Nucl, Sez Milano, Via Celoria 16, I-20133 Milan, Italy.
    Bottoni, S.
    Univ Milan, Dipartimento Fis, I-20133 Milan, Italy;Ist Nazl Fis Nucl, Sez Milano, Via Celoria 16, I-20133 Milan, Italy.
    Brambilla, S.
    Ist Nazl Fis Nucl, Sez Milano, Via Celoria 16, I-20133 Milan, Italy.
    Bast, M.
    Univ Cologne, Inst Kernphys, D-50937 Cologne, Germany.
    Beckers, M.
    Univ Cologne, Inst Kernphys, D-50937 Cologne, Germany.
    Braunroth, T.
    Univ Cologne, Inst Kernphys, D-50937 Cologne, Germany.
    Camera, F.
    Univ Milan, Dipartimento Fis, I-20133 Milan, Italy;Ist Nazl Fis Nucl, Sez Milano, Via Celoria 16, I-20133 Milan, Italy.
    Cieplicka-Orynczak, N.
    Inst Nucl Phys, PAN, PL-31342 Krakow, Poland.
    Clement, E.
    CEA IDRF CNRS IN2P3, GANIL, Blvd Henri Becquerel,Boite Postale 55027, F-14076 Caen, France.
    Coelli, S.
    Ist Nazl Fis Nucl, Sez Milano, Via Celoria 16, I-20133 Milan, Italy.
    Dorvaux, O.
    CNRS IN2P3, IPHC UMR 7178, F-67037 Strasbourg, France.
    Erturk, S.
    Nigde Omer Halisdemir Univ, Sci & Art Fac, Dept Phys, Nigde, Turkey.
    de France, G.
    CEA IDRF CNRS IN2P3, GANIL, Blvd Henri Becquerel,Boite Postale 55027, F-14076 Caen, France.
    Fransen, C.
    Univ Cologne, Inst Kernphys, D-50937 Cologne, Germany.
    Goldkuhle, A.
    Univ Cologne, Inst Kernphys, D-50937 Cologne, Germany.
    Grebosz, J.
    Inst Nucl Phys, PAN, PL-31342 Krakow, Poland.
    Harakeh, M. N.
    KVI Ctr ForAdv Radiat Technol, Groningen, Netherlands.
    Iskra, L. W.
    Inst Nucl Phys, PAN, PL-31342 Krakow, Poland;Ist Nazl Fis Nucl, Sez Milano, Via Celoria 16, I-20133 Milan, Italy.
    Jacquot, B.
    CEA IDRF CNRS IN2P3, GANIL, Blvd Henri Becquerel,Boite Postale 55027, F-14076 Caen, France.
    Karpov, A.
    JINR, FLNR, Dubna 141980, Russia.
    Kicinska-Habior, M.
    Univ Warsaw, Fac Phys, Warsaw, Poland.
    Kim, Y.
    CEA IDRF CNRS IN2P3, GANIL, Blvd Henri Becquerel,Boite Postale 55027, F-14076 Caen, France.
    Kmiecik, M.
    Inst Nucl Phys, PAN, PL-31342 Krakow, Poland.
    Lemasson, A.
    CEA IDRF CNRS IN2P3, GANIL, Blvd Henri Becquerel,Boite Postale 55027, F-14076 Caen, France.
    Lenzi, S. M.
    Ist Nazl Fis Nucl, Sez Padova, I-35131 Padua, Italy;Univ Padua, Dipartimento Fis & Astron, I-35131 Padua, Italy.
    Lewitowicz, M.
    CEA IDRF CNRS IN2P3, GANIL, Blvd Henri Becquerel,Boite Postale 55027, F-14076 Caen, France.
    Li, H.
    CEA IDRF CNRS IN2P3, GANIL, Blvd Henri Becquerel,Boite Postale 55027, F-14076 Caen, France.
    Matea, I
    IPN Orsay Lab, Orsay, France.
    Mazurek, K.
    Inst Nucl Phys, PAN, PL-31342 Krakow, Poland.
    Michelagnoli, C.
    ILL Grenoble, Grenoble, France.
    Matejska-Minda, M.
    Inst Nucl Phys, PAN, PL-31342 Krakow, Poland;Univ Warsaw, Heavy Ion Lab, PL-02093 Warsaw, Poland.
    Million, B.
    Ist Nazl Fis Nucl, Sez Milano, Via Celoria 16, I-20133 Milan, Italy.
    Mueller-Gatermann, C.
    Univ Cologne, Inst Kernphys, D-50937 Cologne, Germany.
    Nanal, V
    Tata Inst Fundamental Res, Mumbai 400005, Maharashtra, India.
    Napiorkowski, P.
    Univ Warsaw, Heavy Ion Lab, PL-02093 Warsaw, Poland.
    Napoli, D. R.
    Ist Nazl Fis Nucl, Lab Nazl Legnaro, I-35020 Legnaro, Italy.
    Palit, R.
    Tata Inst Fundamental Res, Mumbai 400005, Maharashtra, India.
    Rejmund, M.
    CEA IDRF CNRS IN2P3, GANIL, Blvd Henri Becquerel,Boite Postale 55027, F-14076 Caen, France.
    Schmitt, Ch
    CNRS IN2P3, IPHC UMR 7178, F-67037 Strasbourg, France.
    Stanoiu, M.
    IFIN HH, Bucharest, Romania.
    Stefan, I
    IPN Orsay Lab, Orsay, France.
    Vardaci, E.
    Univ Napoli, Naples, Italy;Ist Nazl Fis Nucl, Sez Napoli, Naples, Italy.
    Wasilewska, B.
    Inst Nucl Phys, PAN, PL-31342 Krakow, Poland.
    Wieland, O.
    Ist Nazl Fis Nucl, Sez Milano, Via Celoria 16, I-20133 Milan, Italy.
    Zieblinski, M.
    Inst Nucl Phys, PAN, PL-31342 Krakow, Poland.
    Zielinska, M.
    Ctr CEA Saclay, CEA DRF, IRFU, F-91191 Gif Sur Yvette, France.
    Atac, A.
    Royal Inst Technol KTH, Dept Phys, SE-10691 Stockholm, Sweden.
    Barrientos, D.
    CERN, CH-1211 Geneva 23, Switzerland.
    Birkenbach, B.
    Univ Cologne, Inst Kernphys, D-50937 Cologne, Germany.
    Boston, A. J.
    Univ Liverpool, Oliver Lodge Lab, Liverpool L69 7ZE, Merseyside, England.
    Cederwall, B.
    Royal Inst Technol KTH, Dept Phys, SE-10691 Stockholm, Sweden.
    Charles, L.
    CNRS IN2P3, IPHC UMR 7178, F-67037 Strasbourg, France.
    Collado, J.
    Univ Valencia, Dept Ingn Elect, Valencia, Spain.
    Cullen, D. M.
    Univ Manchester, Schuster Lab, Nucl Phys Grp, Manchester M13 9PL, Lancs, England.
    Desesquelles, P.
    Univ Paris Sud, Univ Paris Saclay, CSNSM, CNRS,IN2P3, Batiment 104, F-91405 Orsay, France.
    Domingo-Pardo, C.
    Univ Valencia, Inst Fis Corpuscular, CSIC, E-46071 Valencia, Spain.
    Dudouet, J.
    Univ Lyon 1, UMR5822, CNRS, IPNL,IN2P3, F-69622 Villeurbanne, France.
    Eberth, J.
    Univ Cologne, Inst Kernphys, D-50937 Cologne, Germany.
    Gonzalez, V
    Univ Valencia, Dept Ingn Elect, Valencia, Spain.
    Goupil, J.
    CEA IDRF CNRS IN2P3, GANIL, Blvd Henri Becquerel,Boite Postale 55027, F-14076 Caen, France.
    Harkness-Brennan, L. J.
    Univ Liverpool, Oliver Lodge Lab, Liverpool L69 7ZE, Merseyside, England.
    Hess, H.
    Univ Cologne, Inst Kernphys, D-50937 Cologne, Germany.
    Judson, D. S.
    Univ Liverpool, Oliver Lodge Lab, Liverpool L69 7ZE, Merseyside, England.
    Jungclaus, A.
    CSIC, Inst Estruct Mat, Madrid, Spain.
    Korten, W.
    Ctr CEA Saclay, CEA DRF, IRFU, F-91191 Gif Sur Yvette, France.
    Labiche, M.
    STFC Daresbury Lab, Warrington WA4 4AD, Cheshire, England.
    Alexis, L.
    CEA IDRF CNRS IN2P3, GANIL, Blvd Henri Becquerel,Boite Postale 55027, F-14076 Caen, France.
    Menegazzo, R.
    Ist Nazl Fis Nucl, Sez Padova, I-35131 Padua, Italy.
    Mengoni, D.
    Ist Nazl Fis Nucl, Sez Padova, I-35131 Padua, Italy;Univ Padua, Dipartimento Fis & Astron, I-35131 Padua, Italy.
    Nyberg, Johan
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Perez-Vidal, R. M.
    Univ Valencia, Inst Fis Corpuscular, CSIC, E-46071 Valencia, Spain.
    Podolyak, Zs
    Univ Surrey, Dept Phys, Guildford GU2 7XH, Surrey, England.
    Pullia, A.
    Univ Milan, Dipartimento Fis, I-20133 Milan, Italy;Ist Nazl Fis Nucl, Sez Milano, Via Celoria 16, I-20133 Milan, Italy.
    Recchia, F.
    Ist Nazl Fis Nucl, Sez Padova, I-35131 Padua, Italy;Univ Padua, Dipartimento Fis & Astron, I-35131 Padua, Italy.
    Reiter, P.
    Univ Cologne, Inst Kernphys, D-50937 Cologne, Germany.
    Saillant, F.
    CEA IDRF CNRS IN2P3, GANIL, Blvd Henri Becquerel,Boite Postale 55027, F-14076 Caen, France.
    Salsac, M. D.
    Ctr CEA Saclay, CEA DRF, IRFU, F-91191 Gif Sur Yvette, France.
    Sanchis, E.
    Univ Valencia, Dept Ingn Elect, Valencia, Spain.
    Stezowski, O.
    Univ Lyon 1, UMR5822, CNRS, IPNL,IN2P3, F-69622 Villeurbanne, France.
    Theisen, C.
    Ctr CEA Saclay, CEA DRF, IRFU, F-91191 Gif Sur Yvette, France.
    Valiente-Dobon, J. J.
    Ist Nazl Fis Nucl, Lab Nazl Legnaro, I-35020 Legnaro, Italy.
    Holt, J. D.
    TRIUMF, 4004 Wesbrook Mall, Vancouver, BC V6T 2A3, Canada;McGill Univ, Dept Phys, 3600 Rue Univ, Montreal, PQ H3A 2T8, Canada.
    Menendez, J.
    Univ Tokyo, Ctr Nucl Study, Tokyo 113003, Japan;Dept Fis Quant & Astrofis, Marti I Franques 1, Barcelona 08028, Spain.
    Schwenk, A.
    Tech Univ Darmstadt, Inst Kemphys, D-64289 Darmstadt, Germany;GSI Helmholtzzentrum Schwerionenforsch GmbH, ExtreMe Matter Inst EMMI, D-64291 Darmstadt, Germany;Max Planck Inst Kemphys, Saupfercheckweg 1, D-69117 Heidelberg, Germany.
    Simonis, J.
    Johannes Gutenberg Univ Mainz, Inst Kernphys & PRISMA Cluster Excellence, D-55128 Mainz, Germany.
    Testing ab initio nuclear structure in neutron-rich nuclei: Lifetime measurements of second 2(+) state in C-16 and O-202020In: Physical Review C: Covering Nuclear Physics, ISSN 2469-9985, E-ISSN 2469-9993, Vol. 101, no 2, article id 021303Article in journal (Refereed)
    Abstract [en]

    To test the predictive power of ab initio nuclear structure theory, the lifetime of the second 2(+) state in neutron-rich O-20, tau(2(2)(+)) = 150(-30)(+80) fs, and an estimate for the lifetime of the second 2(+) state in C-16 have been obtained for the first time. The results were achieved via a novel Monte Carlo technique that allowed us to measure nuclear state lifetimes in the tens-to-hundreds of femtoseconds range by analyzing the Doppler-shifted gamma-transition line shapes of products of low-energy transfer and deep-inelastic processes in the reaction O-18 (7.0 MeV/u) + Ta-181. The requested sensitivity could only be reached owing to the excellent performances of the Advanced gamma-Tracking Array AGATA, coupled to the PARIS scintillator array and to the VAMOS++ magnetic spectrometer. The experimental lifetimes agree with predictions of ab initio calculations using two- and three-nucleon interactions, obtained with the valence-space in-medium similarity renormalization group for O-20 and with the no-core shell model for C-16. The present measurement shows the power of electromagnetic observables, determined with high-precision gamma spectroscopy, to assess the quality of first-principles nuclear structure calculations, complementing common benchmarks based on nuclear energies. The proposed experimental approach will be essential for short lifetime measurements in unexplored regions of the nuclear chart, including r-process nuclei, when intense beams, produced by Isotope Separation On-Line (ISOL) techniques, become available.

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  • 32. Cui, J. P.
    et al.
    Zhang, Y. L.
    Zhang, S.
    Wang, Y. Z.
    KTH, School of Engineering Sciences (SCI), Physics, Nuclear Physics.
    alpha-decay half-lives of superheavy nuclei2018In: Physical Review C: Covering Nuclear Physics, ISSN 2469-9985, E-ISSN 2469-9993, Vol. 97, no 1, article id 014316Article in journal (Refereed)
    Abstract [en]

    The alpha-decay half-lives of superheavy nuclei (SHN) with Z >= 104 are investigated by employing the effective liquid drop model (ELDM). By comparison between the calculated half-lives and the experimental ones, it is shown that the ELDM is a successful model to reproduce the experimental half-lives of SHN. Within the ELDM the alpha-decay half-lives of Z = 118-120 isotopes are predicted by inputting the alpha-decay energy (Q(alpha)) values extracted from the newest Weizsacker-Skyrme-4 (WS4) model, the finite-range droplet model (FRDM), the Kourra-Tachibaba-Uno-Yamada (KTUY) formula, and the Hartree-Fock-Bogoliubovmean field with the D1S Gogny force (GHFB). It is found that the shell effects at N = 178 and 184 are evident by analyzing the Q(alpha) values and half-lives versus the neutron number N. Because the WS4 Q(alpha) values have the smallest rms deviation, the predicted alpha-decay half-lives could be more accurate than the ones of other models, which will be helpful for future experiments.

  • 33.
    Davies, P. J.
    et al.
    Univ York, York YO10 5DD, N Yorkshire, England..
    Bäck, Torbjörn
    KTH, School of Engineering Sciences (SCI), Physics, Nuclear Physics.
    Zhu, Y.
    Tokyo Univ Sci, Noda, Chiba 2788510, Japan..
    Toward the limit of nuclear binding on the N = Z line: Spectroscopy of Cd-962019In: Physical Review C: Covering Nuclear Physics, ISSN 2469-9985, E-ISSN 2469-9993, Vol. 99, no 2, article id 021302Article in journal (Refereed)
    Abstract [en]

    A gamma -decaying isomeric state (tau(1/2) = 197(-17)(+19) ns) has been identified in Cd-96, which is one alpha particle away from the last known bound N = Z nucleus, Sn-100. Comparison of the results with shell-model calculations has allowed a tentative experimental level scheme to be deduced and the isomer to be interpreted as a medium-spin negative-parity spin trap based on the coupling of isoscalar (T = 0) and isovector (T = 1) neutron-proton pairs. The data also suggest evidence for the population of a 9(+) T = 1 state, which is predicted by shell-model calculations to be yrast. Such a low-lying T = 1 state, which is unknown in lighter mass even-even self-conjugate nuclei, can also be interpreted in terms of the coupling of T = 0 and T = 1 neutron-proton pairs.

  • 34.
    Davies, P. J.
    et al.
    Univ York, York YO10 5DD, N Yorkshire, England.
    Park, J.
    TRIUMF, 4004 Wesbrook Mall, Vancouver, BC V6T 2A3, Canada;Univ British Columbia, Vancouver, BC V6T 1Z1, Canada;Lund Univ, Dept Phys, S-22100 Lund, Sweden.
    Grawe, H.
    GSI Helmholtzzentrum Schwerionenforsch, D-64291 Darmstadt, Germany.
    Wadsworth, R.
    Univ York, York YO10 5DD, N Yorkshire, England.
    Gernhauser, R.
    Tech Univ Munich, D-85748 Garching, Germany.
    Krucken, R.
    TRIUMF, 4004 Wesbrook Mall, Vancouver, BC V6T 2A3, Canada;Univ British Columbia, Vancouver, BC V6T 1Z1, Canada.
    Nowacki, F.
    Univ Strasbourg, F-67037 Strasbourg, France.
    Ahn, D. S.
    RIKEN Nishina Ctr, Wako, Saitama 3510198, Japan.
    Ameil, F.
    GSI Helmholtzzentrum Schwerionenforsch, D-64291 Darmstadt, Germany.
    Baba, H.
    RIKEN Nishina Ctr, Wako, Saitama 3510198, Japan.
    Bäck, T.
    Royal Inst Technol, SE-10691 Stockholm, Sweden.
    Blank, B.
    Ctr Etud Nucl Bordeaux Gradignan, 19 Chemin Solarium,CS 10120, F-33175 Gradignan, France.
    Blazhev, A.
    Univ Cologne, D-50937 Cologne, Germany.
    Boutachkov, P.
    GSI Helmholtzzentrum Schwerionenforsch, D-64291 Darmstadt, Germany;Tech Univ Darmstadt, D-64289 Darmstadt, Germany.
    Browne, F.
    RIKEN Nishina Ctr, Wako, Saitama 3510198, Japan;Univ Brighton, Brighton BN2 4GJ, E Sussex, England.
    Celikovic, I
    CEA, DSM, CNRS, IN2P3,GANIL, Blvd H Becquerel, F-14076 Caen, France;Univ Belgrade, Belgrade 11000, Serbia.
    Dewald, M.
    Univ Cologne, D-50937 Cologne, Germany.
    Doornenbal, P.
    RIKEN Nishina Ctr, Wako, Saitama 3510198, Japan.
    Faestermann, T.
    Tech Univ Munich, D-85748 Garching, Germany.
    Fang, Y.
    Osaka Univ, 1-1 Machikaneyama Machi, Osaka, Toyonaka 5600043, Japan.
    de France, G.
    CEA, DSM, CNRS, IN2P3,GANIL, Blvd H Becquerel, F-14076 Caen, France.
    Fukuda, N.
    RIKEN Nishina Ctr, Wako, Saitama 3510198, Japan.
    Gengelbach, Aila
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Gerl, J.
    GSI Helmholtzzentrum Schwerionenforsch, D-64291 Darmstadt, Germany.
    Giovinazzo, J.
    Ctr Etud Nucl Bordeaux Gradignan, 19 Chemin Solarium,CS 10120, F-33175 Gradignan, France.
    Go, S.
    Univ Tokyo, Bunkyo Ku, Tokyo 1130033, Japan.
    Goel, N.
    GSI Helmholtzzentrum Schwerionenforsch, D-64291 Darmstadt, Germany;Tech Univ Darmstadt, D-64289 Darmstadt, Germany.
    Gorska, M.
    GSI Helmholtzzentrum Schwerionenforsch, D-64291 Darmstadt, Germany.
    Gregor, E.
    GSI Helmholtzzentrum Schwerionenforsch, D-64291 Darmstadt, Germany;Tech Univ Darmstadt, D-64289 Darmstadt, Germany.
    Hotaka, H.
    Tokyo Univ Sci, Dept Phys, Noda, Chiba 2788510, Japan.
    Ilieva, S.
    Tech Univ Darmstadt, D-64289 Darmstadt, Germany.
    Inabe, N.
    RIKEN Nishina Ctr, Wako, Saitama 3510198, Japan.
    Isobe, T.
    RIKEN Nishina Ctr, Wako, Saitama 3510198, Japan.
    Jenkins, D. G.
    Univ York, York YO10 5DD, N Yorkshire, England.
    Jolie, J.
    Univ Cologne, D-50937 Cologne, Germany.
    Jung, H. S.
    Univ Tokyo, Bunkyo Ku, Tokyo 1130033, Japan.
    Jungclaus, A.
    CSIC, Inst Estruct Mat, E-28006 Madrid, Spain.
    Kameda, D.
    RIKEN Nishina Ctr, Wako, Saitama 3510198, Japan.
    Kim, G. D.
    Inst for Basic Sci Korea, Rare Isotope Sci Project, Daejeon 305811, South Korea.
    Kim, Y-K
    Inst for Basic Sci Korea, Rare Isotope Sci Project, Daejeon 305811, South Korea.
    Kojouharov, I
    GSI Helmholtzzentrum Schwerionenforsch, D-64291 Darmstadt, Germany.
    Kubo, T.
    RIKEN Nishina Ctr, Wako, Saitama 3510198, Japan.
    Kurz, N.
    GSI Helmholtzzentrum Schwerionenforsch, D-64291 Darmstadt, Germany.
    Lewitowicz, M.
    CEA, DSM, CNRS, IN2P3,GANIL, Blvd H Becquerel, F-14076 Caen, France.
    Lorusso, G.
    RIKEN Nishina Ctr, Wako, Saitama 3510198, Japan;Natl Phys Lab, Acoust & Ionizing Radiat Div, Teddington TW11 0LW, Middx, England;Univ Surrey, Guildford GU2 7XH, Surrey, England.
    Lubos, D.
    Tech Univ Munich, D-85748 Garching, Germany;RIKEN Nishina Ctr, Wako, Saitama 3510198, Japan.
    Maier, L.
    Tech Univ Munich, D-85748 Garching, Germany.
    Merchan, E.
    GSI Helmholtzzentrum Schwerionenforsch, D-64291 Darmstadt, Germany;Tech Univ Darmstadt, D-64289 Darmstadt, Germany.
    Moschner, K.
    RIKEN Nishina Ctr, Wako, Saitama 3510198, Japan;Univ Cologne, D-50937 Cologne, Germany.
    Murai, D.
    RIKEN Nishina Ctr, Wako, Saitama 3510198, Japan.
    Naqvi, F.
    Yale Univ, New Haven, CT 06511 USA.
    Nishibata, H.
    Osaka Univ, 1-1 Machikaneyama Machi, Osaka, Toyonaka 5600043, Japan.
    Nishimura, D.
    Tokyo City Univ, Setagaya Ku, Tokyo 1588557, Japan.
    Nishimura, S.
    RIKEN Nishina Ctr, Wako, Saitama 3510198, Japan.
    Nishizuka, I
    Tohoku Univ, Sendai, Miyagi 9800845, Japan.
    Patel, Z.
    RIKEN Nishina Ctr, Wako, Saitama 3510198, Japan;Univ Surrey, Guildford GU2 7XH, Surrey, England.
    Pietralla, N.
    Tech Univ Darmstadt, D-64289 Darmstadt, Germany.
    Rajabali, M. M.
    TRIUMF, 4004 Wesbrook Mall, Vancouver, BC V6T 2A3, Canada.
    Rice, S.
    RIKEN Nishina Ctr, Wako, Saitama 3510198, Japan;Univ Surrey, Guildford GU2 7XH, Surrey, England.
    Sakurai, H.
    Univ Tokyo, Bunkyo Ku, Tokyo 1130033, Japan.
    Schaffner, H.
    GSI Helmholtzzentrum Schwerionenforsch, D-64291 Darmstadt, Germany.
    Shimizu, Y.
    RIKEN Nishina Ctr, Wako, Saitama 3510198, Japan.
    Sinclair, L. F.
    Univ York, York YO10 5DD, N Yorkshire, England;RIKEN Nishina Ctr, Wako, Saitama 3510198, Japan.
    Soederstroem, P-A
    GSI Helmholtzzentrum Schwerionenforsch, D-64291 Darmstadt, Germany;RIKEN Nishina Ctr, Wako, Saitama 3510198, Japan.
    Steiger, K.
    Tech Univ Munich, D-85748 Garching, Germany.
    Sumikama, T.
    Tohoku Univ, Sendai, Miyagi 9800845, Japan.
    Suzuki, H.
    RIKEN Nishina Ctr, Wako, Saitama 3510198, Japan.
    Takeda, H.
    RIKEN Nishina Ctr, Wako, Saitama 3510198, Japan.
    Taprogge, J.
    CSIC, Inst Estruct Mat, E-28006 Madrid, Spain.
    Thöle, P.
    Univ Cologne, D-50937 Cologne, Germany.
    Valder, S.
    Univ York, York YO10 5DD, N Yorkshire, England.
    Wang, Z.
    TRIUMF, 4004 Wesbrook Mall, Vancouver, BC V6T 2A3, Canada.
    Warr, N.
    Univ Cologne, D-50937 Cologne, Germany.
    Watanabe, H.
    RIKEN Nishina Ctr, Wako, Saitama 3510198, Japan;Beihang Univ, Beijing 100191, Peoples R China.
    Werner, V
    Tech Univ Darmstadt, D-64289 Darmstadt, Germany;Yale Univ, New Haven, CT 06511 USA.
    Wu, J.
    RIKEN Nishina Ctr, Wako, Saitama 3510198, Japan;Peking Univ, Beijing 100871, Peoples R China.
    Xu, Z. Y.
    RIKEN Nishina Ctr, Wako, Saitama 3510198, Japan.
    Yagi, A.
    Osaka Univ, Ibaraki, Osaka 5670047, Japan.
    Yoshinaga, K.
    RIKEN Nishina Ctr, Wako, Saitama 3510198, Japan.
    Zhu, Y.
    Tokyo Univ Sci, Noda, Chiba 2788510, Japan.
    Toward the limit of nuclear binding on the N = Z line: Spectroscopy of Cd-962019In: Physical Review C: Covering Nuclear Physics, ISSN 2469-9985, E-ISSN 2469-9993, Vol. 99, no 2, article id 021302Article in journal (Refereed)
    Abstract [en]

    A gamma -decaying isomeric state (tau(1/2) = 197(-17)(+19) ns) has been identified in Cd-96, which is one alpha particle away from the last known bound N = Z nucleus, Sn-100. Comparison of the results with shell-model calculations has allowed a tentative experimental level scheme to be deduced and the isomer to be interpreted as a medium-spin negative-parity spin trap based on the coupling of isoscalar (T = 0) and isovector (T = 1) neutron-proton pairs. The data also suggest evidence for the population of a 9(+) T = 1 state, which is predicted by shell-model calculations to be yrast. Such a low-lying T = 1 state, which is unknown in lighter mass even-even self-conjugate nuclei, can also be interpreted in terms of the coupling of T = 0 and T = 1 neutron-proton pairs.

  • 35.
    Doncel, Maria
    et al.
    KTH, School of Engineering Sciences (SCI), Physics.
    Bäck, Torbjörn
    KTH, School of Engineering Sciences (SCI), Physics.
    Qi, C.
    Cullen, D. M.
    Hodge, D.
    Cederwall, Bo
    KTH, School of Engineering Sciences (SCI), Physics.
    Taylor, M. J.
    Procter, M.
    Giles, M.
    Auranen, K.
    Grahn, T.
    Greenlees, P. T.
    Jakobsson, U.
    Julin, R.
    Juutinen, S.
    Herzáň, A.
    Konki, J.
    Pakarinen, J.
    Partanen, J.
    Peura, P.
    Rahkila, P.
    Ruotsalainen, P.
    Sandzelius, M.
    Sarén, J.
    Scholey, C.
    Sorri, J.
    Stolze, S.
    Uusitalo, J.
    Spin-dependent evolution of collectivity in Te 1122017In: Physical Review C: Covering Nuclear Physics, ISSN 2469-9985, E-ISSN 2469-9993, Vol. 96, no 5, article id 051304Article in journal (Refereed)
    Abstract [en]

    The evolution of collectivity with spin along the yrast line in the neutron-deficient nucleus Te112 has been studied by measuring the reduced transition probability of excited states in the yrast band. In particular, the lifetimes of the 4+ and 6+ excited states have been determined by using the recoil distance Doppler-shift method. The results are discussed using both large-scale shell-model and total Routhian surface calculations.

  • 36.
    Doncel, Maria
    et al.
    KTH, School of Engineering Sciences (SCI), Physics.
    Cederwall, Bo
    KTH, School of Engineering Sciences (SCI), Physics.
    Qi, Chong
    KTH, School of Engineering Sciences (SCI), Physics.
    Li, Hongjie J.
    KTH, School of Engineering Sciences (SCI), Physics, Nuclear Physics.
    Jakobsson, Ulrika
    KTH, School of Engineering Sciences (SCI), Physics.
    Auranen, K.
    Boenig, S.
    Drummond, M. C.
    Grahn, T.
    Greenlees, P. T.
    Herzan, A.
    Joss, D. T.
    Julin, R.
    Juutinen, S.
    Konki, J.
    Kroell, T.
    Leino, M.
    McPeake, C.
    O'Donnell, D.
    Page, R. D.
    Pakarinen, J.
    Partanen, J.
    Peura, P.
    Rahkila, P.
    Ruotsalainen, P.
    Sandzelius, M.
    Saren, J.
    Saygi, B.
    Scholey, C.
    Sorri, J.
    Stolze, S.
    Taylor, M. J.
    Thornthwaite, A.
    Uusitalo, J.
    Lifetime measurements of excited states in W-162 and W-164 and the evolution of collectivity in rare-earth nuclei2017In: Physical Review C: Covering Nuclear Physics, ISSN 2469-9985, E-ISSN 2469-9993, Vol. 95, no 4, article id 044321Article in journal (Refereed)
    Abstract [en]

    Lifetimes of the first excited 2(+) states in the extremely neutron- deficient W-162 and W-164 nuclei have been measured using the recoil distance Doppler shift technique. Experimental B(E2) data for the isotopic chains of hafnium, tungsten, and osmium, from the midshell region near the beta-stability line towards the N = 82 closed shell and the most neutron-deficient nuclides, are compared with predictions of nuclear deformations and 2(1)(+) -> 0(g.s)(.+) reduced transition strengths from different classes of state-of-the-art theoretical model calculations. The results reveal striking differences and deficiencies in the predictive power of current nuclear structure models.

  • 37.
    Fäldt, Göran
    et al.
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Wilkin, C.
    UCL, Phys & Astron Dept, Gower St, London WC1E 6BT, England..
    Phenomenological study of the pp -> pi(+) pn reaction2018In: Physical Review C: Covering Nuclear Physics, ISSN 2469-9985, E-ISSN 2469-9993, Vol. 97, no 2, article id 025201Article in journal (Refereed)
    Abstract [en]

    Fully constrained bubble chamber data on the pp -> pi(+) pn and pp -> pi(+) d reactions are used to investigate the ratio of the counting rates for the two processes as function of the pn excitation energy Q. Though it is important to include effects associated with the p-wave nature of pion production, the data are insufficient to establish unambiguously the dependence on Q. The angular distributions show the presence of higher partial waves which seem to be anomalously large at small Q. The dispersion relation method to determine scattering lengths is extended to encompass cases where, as for the pp -> pi(+) pn reaction, there is a bound state and, in a test example, it is shown that the values deduced for the low-energy neutron-proton scattering parameters are significantly influenced by the pion p-wave behavior.

  • 38.
    Goldkuhle, A.
    et al.
    Univ Cologne, Inst Kernphys, D-50937 Cologne, Germany..
    Atac Nyberg, Ayse
    KTH, School of Engineering Sciences (SCI), Physics, Nuclear Physics.
    Cederwall, Bo
    KTH, School of Engineering Sciences (SCI), Physics, Nuclear Physics.
    Zielinska, M.
    Univ Paris Saclay, CEA, Irfu, F-91191 Gif Sur Yvette, France..
    et al.,
    Lifetime measurements in Ti-52,Ti-54 to study shell evolution toward N=322019In: Physical Review C: Covering Nuclear Physics, ISSN 2469-9985, E-ISSN 2469-9993, Vol. 100, no 5, article id 054317Article in journal (Refereed)
    Abstract [en]

    Lifetimes of the excited states in the neutron-rich Ti-52,Ti-54 nuclei, produced in a multinucleon-transfer reaction, were measured by employing the Cologne plunger device and the recoil-distance Doppler-shift method. The experiment was performed at the Grand Accelerateur National d'Ions Lourds facility by using the Advanced Gamma Tracking Array for the gamma-ray detection, coupled to the large-acceptance variable mode spectrometer for an event-by-event particle identification. A comparison between the transition probabilities obtained from the measured lifetimes of the 2(1)(+) to 8(1)(+) yrast states in Ti-52,Ti-54 and that from the shell-model calculations based on the well-established GXPF1A, GXPF1B, and KB3G fp shell interactions support the N = 32 subshell closure. The B(E2) values for Ti-52 determined in this work are in disagreement with the known data, but are consistent with the predictions of the shell-model calculations and reduce the previously observed pronounced staggering across the even-even titanium isotopes.

  • 39.
    Goldkuhle, A.
    et al.
    Univ Cologne, Inst Kernphys, D-50937 Cologne, Germany.
    Fransen, C.
    Univ Cologne, Inst Kernphys, D-50937 Cologne, Germany.
    Blazhev, A.
    Univ Cologne, Inst Kernphys, D-50937 Cologne, Germany.
    Beckers, M.
    Univ Cologne, Inst Kernphys, D-50937 Cologne, Germany.
    Birkenbach, B.
    Univ Cologne, Inst Kernphys, D-50937 Cologne, Germany.
    Braunroth, T.
    Univ Cologne, Inst Kernphys, D-50937 Cologne, Germany.
    Clement, E.
    CEA, IDRF, GANIL, CNRS,IN2P3, BP 55027, F-14076 Caen 05, France.
    Dewald, A.
    Univ Cologne, Inst Kernphys, D-50937 Cologne, Germany.
    Dudouet, J.
    Univ Lyon, CNRS, IN2P3, IPN Lyon, F-69622 Villeurbanne, France.
    Eberth, J.
    Univ Cologne, Inst Kernphys, D-50937 Cologne, Germany.
    Hess, H.
    Univ Cologne, Inst Kernphys, D-50937 Cologne, Germany.
    Jacquot, B.
    CEA, IDRF, GANIL, CNRS,IN2P3, BP 55027, F-14076 Caen 05, France.
    Jolie, J.
    Univ Cologne, Inst Kernphys, D-50937 Cologne, Germany.
    Kim, Y-H
    Inst Laue Langevin, BP 156, F-38042 Grenoble 9, France.
    Lemasson, A.
    CEA, IDRF, GANIL, CNRS,IN2P3, BP 55027, F-14076 Caen 05, France.
    Lenzi, S. M.
    Ist Nazl Fis Nucl, Sez Padova, I-35131 Padua, Italy;Univ Padua, Dipartimento Fis & Astron, I-35131 Padua, Italy.
    Li, H. J.
    CEA, IDRF, GANIL, CNRS,IN2P3, BP 55027, F-14076 Caen 05, France.
    Litzinger, J.
    Univ Cologne, Inst Kernphys, D-50937 Cologne, Germany.
    Michelagnoli, C.
    CEA, IDRF, GANIL, CNRS,IN2P3, BP 55027, F-14076 Caen 05, France;Ist Nazl Fis Nucl, Sez Padova, I-35131 Padua, Italy;Univ Padua, Dipartimento Fis & Astron, I-35131 Padua, Italy.
    Mueller-Gatermann, C.
    Univ Cologne, Inst Kernphys, D-50937 Cologne, Germany.
    Singh, B. S. Nara
    Univ Manchester, Schuster Lab, Nucl Phys Grp, Manchester M13 9PL, Lancs, England;Univ West Scotland, Sch Comp Engn & Phys Sci, Paisley PA1 2BE, Renfrew, Scotland.
    Perez-Vidal, R. M.
    Univ Valencia, CSIC, Inst Fis Corpuscular, E-46071 Valencia, Spain.
    Ralet, D.
    CNRS, CSNSM, IN2P3, F-91405 Orsay, France;Univ Paris Sud, F-91405 Orsay, France;Helmholtzzentrum Schwerionenforsch GmbH, GSI, D-64291 Darmstadt, Germany;Tech Univ Darmstadt, Inst Kernphys, D-64289 Darmstadt, Germany.
    Reiter, P.
    Univ Cologne, Inst Kernphys, D-50937 Cologne, Germany.
    Vogt, A.
    Univ Cologne, Inst Kernphys, D-50937 Cologne, Germany.
    Warr, N.
    Univ Cologne, Inst Kernphys, D-50937 Cologne, Germany.
    Zell, K. O.
    Univ Cologne, Inst Kernphys, D-50937 Cologne, Germany.
    Atac, A.
    Royal Inst Technol, Dept Phys, SE-10691 Stockholm, Sweden.
    Barrientos, D.
    CERN, CH-1211 Geneva 23, Switzerland.
    Barthe-Dejean, C.
    CEA, IDRF, GANIL, CNRS,IN2P3, BP 55027, F-14076 Caen 05, France.
    Benzoni, G.
    Ist Nazl Fis Nucl, Sez Milano, I-20133 Milan, Italy.
    Boston, A. J.
    Univ Liverpool, Oliver Lodge Lab, Liverpool L69 7ZE, Merseyside, England.
    Boston, H. C.
    Univ Liverpool, Oliver Lodge Lab, Liverpool L69 7ZE, Merseyside, England.
    Bourgault, P.
    CEA, IDRF, GANIL, CNRS,IN2P3, BP 55027, F-14076 Caen 05, France.
    Burrows, I
    STFC Daresbury Lab, Warrington WA4 4AD, Cheshire, England.
    Cacitti, J.
    CEA, IDRF, GANIL, CNRS,IN2P3, BP 55027, F-14076 Caen 05, France.
    Cederwall, B.
    Royal Inst Technol, Dept Phys, SE-10691 Stockholm, Sweden.
    Ciemala, M.
    Polish Acad Sci, Henryk Niewodniczanski Inst Nucl Phys, Ul Radzikowskiego 152, PL-31342 Krakow, Poland.
    Cullen, D. M.
    Univ Manchester, Schuster Lab, Nucl Phys Grp, Manchester M13 9PL, Lancs, England.
    De France, G.
    CEA, IDRF, GANIL, CNRS,IN2P3, BP 55027, F-14076 Caen 05, France.
    Domingo-Pardo, C.
    Univ Valencia, CSIC, Inst Fis Corpuscular, E-46071 Valencia, Spain.
    Foucher, J-L
    CEA, IDRF, GANIL, CNRS,IN2P3, BP 55027, F-14076 Caen 05, France.
    Fremont, G.
    CEA, IDRF, GANIL, CNRS,IN2P3, BP 55027, F-14076 Caen 05, France.
    Gadea, A.
    Univ Valencia, CSIC, Inst Fis Corpuscular, E-46071 Valencia, Spain.
    Gangnant, P.
    CEA, IDRF, GANIL, CNRS,IN2P3, BP 55027, F-14076 Caen 05, France.
    Gonzalez, V
    Univ Valencia, Dept Ingn Elect, Valencia, Spain.
    Goupil, J.
    CEA, IDRF, GANIL, CNRS,IN2P3, BP 55027, F-14076 Caen 05, France.
    Henrich, C.
    Tech Univ Darmstadt, Inst Kernphys, D-64289 Darmstadt, Germany.
    Houarner, C.
    CEA, IDRF, GANIL, CNRS,IN2P3, BP 55027, F-14076 Caen 05, France.
    Jean, M.
    CEA, IDRF, GANIL, CNRS,IN2P3, BP 55027, F-14076 Caen 05, France.
    Judson, D. S.
    Univ Liverpool, Oliver Lodge Lab, Liverpool L69 7ZE, Merseyside, England.
    Korichi, A.
    CNRS, CSNSM, IN2P3, F-91405 Orsay, France;Univ Paris Sud, F-91405 Orsay, France.
    Korten, W.
    Univ Paris Saclay, CEA, Irfu, F-91191 Gif Sur Yvette, France.
    Labiche, M.
    STFC Daresbury Lab, Warrington WA4 4AD, Cheshire, England.
    Lefevre, A.
    CEA, IDRF, GANIL, CNRS,IN2P3, BP 55027, F-14076 Caen 05, France.
    Legeard, L.
    CEA, IDRF, GANIL, CNRS,IN2P3, BP 55027, F-14076 Caen 05, France.
    Legruel, F.
    CEA, IDRF, GANIL, CNRS,IN2P3, BP 55027, F-14076 Caen 05, France.
    Leoni, S.
    Ist Nazl Fis Nucl, Sez Milano, I-20133 Milan, Italy;Univ Milan, Dipartimento Fis, I-20133 Milan, Italy.
    Ljungvall, J.
    CNRS, CSNSM, IN2P3, F-91405 Orsay, France;Univ Paris Sud, F-91405 Orsay, France.
    Maj, A.
    Polish Acad Sci, Henryk Niewodniczanski Inst Nucl Phys, Ul Radzikowskiego 152, PL-31342 Krakow, Poland.
    Maugeais, C.
    CEA, IDRF, GANIL, CNRS,IN2P3, BP 55027, F-14076 Caen 05, France.
    Menager, L.
    CEA, IDRF, GANIL, CNRS,IN2P3, BP 55027, F-14076 Caen 05, France.
    Menard, N.
    CEA, IDRF, GANIL, CNRS,IN2P3, BP 55027, F-14076 Caen 05, France.
    Menegazzo, R.
    Ist Nazl Fis Nucl, Sez Padova, I-35131 Padua, Italy.
    Mengoni, D.
    Ist Nazl Fis Nucl, Sez Padova, I-35131 Padua, Italy;Univ Padua, Dipartimento Fis & Astron, I-35131 Padua, Italy.
    Million, B.
    Ist Nazl Fis Nucl, Sez Milano, I-20133 Milan, Italy.
    Munoz, H.
    CEA, IDRF, GANIL, CNRS,IN2P3, BP 55027, F-14076 Caen 05, France.
    Napoli, D. R.
    Ist Nazl Fis Nucl, Lab Nazl Legnaro, I-35020 Legnaro, Italy.
    Navin, A.
    CEA, IDRF, GANIL, CNRS,IN2P3, BP 55027, F-14076 Caen 05, France.
    Nyberg, Johan
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Ozille, M.
    CEA, IDRF, GANIL, CNRS,IN2P3, BP 55027, F-14076 Caen 05, France.
    Podolyak, Zs
    Univ Surrey, Dept Phys, Guildford GU2 7XH, England.
    Pullia, A.
    Ist Nazl Fis Nucl, Sez Milano, I-20133 Milan, Italy;Univ Milan, Dept Phys, I-20133 Milan, Italy.
    Raine, B.
    CEA, IDRF, GANIL, CNRS,IN2P3, BP 55027, F-14076 Caen 05, France.
    Recchia, F.
    Ist Nazl Fis Nucl, Sez Padova, I-35131 Padua, Italy;Univ Padua, Dipartimento Fis & Astron, I-35131 Padua, Italy.
    Ropert, J.
    CEA, IDRF, GANIL, CNRS,IN2P3, BP 55027, F-14076 Caen 05, France.
    Saillant, F.
    CEA, IDRF, GANIL, CNRS,IN2P3, BP 55027, F-14076 Caen 05, France.
    Salsac, M. D.
    Univ Paris Saclay, CEA, Irfu, F-91191 Gif Sur Yvette, France.
    Sanchis, E.
    Univ Valencia, Dept Ingn Elect, Valencia, Spain.
    Schmitt, C.
    CEA, IDRF, GANIL, CNRS,IN2P3, BP 55027, F-14076 Caen 05, France.
    Simpson, J.
    STFC Daresbury Lab, Warrington WA4 4AD, Cheshire, England.
    Spitaels, C.
    CEA, IDRF, GANIL, CNRS,IN2P3, BP 55027, F-14076 Caen 05, France.
    Stezowski, O.
    Univ Lyon, CNRS, IN2P3, IPN Lyon, F-69622 Villeurbanne, France.
    Theisen, Ch
    Univ Paris Saclay, CEA, Irfu, F-91191 Gif Sur Yvette, France.
    Toulemonde, M.
    Univ Caen, ENSICAEN, GANIL, CEA,CNRS,CIMAP, BP 5133, F-14070 Caen, France.
    Tripon, M.
    CEA, IDRF, GANIL, CNRS,IN2P3, BP 55027, F-14076 Caen 05, France.
    Dobon, J-J Valiente
    Ist Nazl Fis Nucl, Lab Nazl Legnaro, I-35020 Legnaro, Italy.
    Voltolini, G.
    CEA, IDRF, GANIL, CNRS,IN2P3, BP 55027, F-14076 Caen 05, France.
    Zielinska, M.
    Univ Paris Saclay, CEA, Irfu, F-91191 Gif Sur Yvette, France.
    Lifetime measurements in Ti-52,Ti-54 to study shell evolution toward N=322019In: Physical Review C: Covering Nuclear Physics, ISSN 2469-9985, E-ISSN 2469-9993, Vol. 100, no 5, article id 054317Article in journal (Refereed)
    Abstract [en]

    Lifetimes of the excited states in the neutron-rich Ti-52,Ti-54 nuclei, produced in a multinucleon-transfer reaction, were measured by employing the Cologne plunger device and the recoil-distance Doppler-shift method. The experiment was performed at the Grand Accelerateur National d'Ions Lourds facility by using the Advanced Gamma Tracking Array for the gamma-ray detection, coupled to the large-acceptance variable mode spectrometer for an event-by-event particle identification. A comparison between the transition probabilities obtained from the measured lifetimes of the 2(1)(+) to 8(1)(+) yrast states in Ti-52,Ti-54 and that from the shell-model calculations based on the well-established GXPF1A, GXPF1B, and KB3G fp shell interactions support the N = 32 subshell closure. The B(E2) values for Ti-52 determined in this work are in disagreement with the known data, but are consistent with the predictions of the shell-model calculations and reduce the previously observed pronounced staggering across the even-even titanium isotopes.

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  • 40.
    Hadynska-Klek, K.
    et al.
    Univ Warsaw, Heavy Ion Lab, Pasteura 5A, PL-02093 Warsaw, Poland.;Univ Warsaw, Fac Phys, PL-00681 Warsaw, Poland.;Univ Oslo, Dept Phys, N-0316 Oslo, Norway.;INFN Lab Nazl Legnaro, Viale Univ 2, I-35020 Legnaro, Italy.;Univ Surrey, Dept Phys, Guildford GU2 7XH, Surrey, England..
    Napiorkowski, P. J.
    Univ Warsaw, Heavy Ion Lab, Pasteura 5A, PL-02093 Warsaw, Poland..
    Zielinska, M.
    Univ Warsaw, Heavy Ion Lab, Pasteura 5A, PL-02093 Warsaw, Poland.;Univ Paris Saclay, CEA, Irfu, F-91191 Gif Sur Yvette, France..
    Srebrny, J.
    Univ Warsaw, Heavy Ion Lab, Pasteura 5A, PL-02093 Warsaw, Poland..
    Maj, A.
    Polish Acad Sci, Inst Nucl Phys, PL-31342 Krakow, Poland..
    Azaiez, F.
    Inst Phys Nucl Orsay, F-91400 Orsay, France..
    Dobon, J. J. Valiente
    INFN Lab Nazl Legnaro, Viale Univ 2, I-35020 Legnaro, Italy..
    Kicinska-Habior, M.
    Univ Warsaw, Fac Phys, PL-00681 Warsaw, Poland..
    Nowacki, F.
    Univ Strasbourg, IPHC, CNRS, UMR7178, 23 Rue Loess, F-67037 Strasbourg, France..
    Naidja, H.
    Univ Strasbourg, IPHC, CNRS, UMR7178, 23 Rue Loess, F-67037 Strasbourg, France.;GSI Helmholtzzentrum Schwerionenforsch GmbH, D-64291 Darmstadt, Germany.;Univ Constantine 1, LPMS, Route Ain El Bey, Constantine 25000, Algeria..
    Bounthong, B.
    Univ Strasbourg, IPHC, CNRS, UMR7178, 23 Rue Loess, F-67037 Strasbourg, France..
    Rodriguez, T. R.
    Univ Autonoma Madrid, Dept Fis Teor, Madrid, Spain..
    de Angelis, G.
    INFN Lab Nazl Legnaro, Viale Univ 2, I-35020 Legnaro, Italy..
    Abraham, T.
    Univ Warsaw, Heavy Ion Lab, Pasteura 5A, PL-02093 Warsaw, Poland..
    Kumar, G. Anil
    Polish Acad Sci, Inst Nucl Phys, PL-31342 Krakow, Poland..
    Bazzacco, D.
    INFN Sez Padova, I-35131 Padua, Italy.;Univ Padua, Dipartimento Fis & Astron, I-35131 Padua, Italy..
    Bellato, M.
    INFN Sez Padova, I-35131 Padua, Italy..
    Bortolato, D.
    INFN Sez Padova, I-35131 Padua, Italy..
    Bednarczyk, P.
    Polish Acad Sci, Inst Nucl Phys, PL-31342 Krakow, Poland..
    Benzoni, G.
    INFN Sez Milano, I-20133 Milan, Italy..
    Berti, L.
    INFN Lab Nazl Legnaro, Viale Univ 2, I-35020 Legnaro, Italy..
    Birkenbach, B.
    Univ Cologne, Inst Kernphys, Zulpicher Str 77, D-50937 Cologne, Germany..
    Bruyneel, B.
    Univ Cologne, Inst Kernphys, Zulpicher Str 77, D-50937 Cologne, Germany..
    Brambilla, S.
    INFN Sez Milano, I-20133 Milan, Italy..
    Camera, F.
    INFN Sez Milano, I-20133 Milan, Italy.;Univ Milan, Dipartimento Fis, I-20133 Milan, Italy..
    Chavas, J.
    Univ Paris Saclay, CEA, Irfu, F-91191 Gif Sur Yvette, France..
    Cederwall, B.
    Royal Inst Technol, Dept Phys, SE-10691 Stockholm, Sweden..
    Charles, L.
    Univ Strasbourg, IPHC, CNRS, UMR7178, 23 Rue Loess, F-67037 Strasbourg, France..
    Ciemala, M.
    Polish Acad Sci, Inst Nucl Phys, PL-31342 Krakow, Poland..
    Cocconi, P.
    INFN Lab Nazl Legnaro, Viale Univ 2, I-35020 Legnaro, Italy..
    Coleman-Smith, P.
    Daresbury Lab, Warrington WA4 4AD, Cheshire, England..
    Colombo, A.
    INFN Sez Padova, I-35131 Padua, Italy..
    Corsi, A.
    INFN Sez Milano, I-20133 Milan, Italy.;Univ Milan, Dipartimento Fis, I-20133 Milan, Italy..
    Crespi, F. C. L.
    INFN Sez Milano, I-20133 Milan, Italy.;Univ Milan, Dipartimento Fis, I-20133 Milan, Italy..
    Cullen, D. M.
    Univ Manchester, Sch Phys & Astron, Schuster Lab, Manchester M13 9PL, Lancs, England..
    Czermak, A.
    Polish Acad Sci, Inst Nucl Phys, PL-31342 Krakow, Poland..
    Desesquelles, P.
    Univ Paris 11, F-91400 Orsay, France.;CNRS, CSNSM, IN2P3, F-91405 Orsay, France..
    Doherty, D. T.
    Univ Surrey, Dept Phys, Guildford GU2 7XH, Surrey, England.;Univ Paris Saclay, CEA, Irfu, F-91191 Gif Sur Yvette, France.;Univ York, Dept Phys, York YO10 5DD, N Yorkshire, England..
    Dulny, B.
    Polish Acad Sci, Inst Nucl Phys, PL-31342 Krakow, Poland..
    Eberth, J.
    Univ Cologne, Inst Kernphys, Zulpicher Str 77, D-50937 Cologne, Germany..
    Farnea, E.
    INFN Sez Padova, I-35131 Padua, Italy.;Univ Padua, Dipartimento Fis & Astron, I-35131 Padua, Italy..
    Fornal, B.
    Polish Acad Sci, Inst Nucl Phys, PL-31342 Krakow, Poland..
    Franchoo, S.
    Inst Phys Nucl Orsay, F-91400 Orsay, France..
    Gadea, A.
    Univ Valencia, CSIC, Inst Fis Corpuscular IFIC, S-46980 Valencia, Spain..
    Giaz, A.
    INFN Sez Milano, I-20133 Milan, Italy.;Univ Milan, Dipartimento Fis, I-20133 Milan, Italy..
    Gottardo, A.
    INFN Lab Nazl Legnaro, Viale Univ 2, I-35020 Legnaro, Italy..
    Grave, X.
    Inst Phys Nucl Orsay, F-91400 Orsay, France..
    Grebosz, J.
    Polish Acad Sci, Inst Nucl Phys, PL-31342 Krakow, Poland..
    Gorgen, A.
    Univ Oslo, Dept Phys, N-0316 Oslo, Norway..
    Gulmini, M.
    INFN Lab Nazl Legnaro, Viale Univ 2, I-35020 Legnaro, Italy..
    Habermann, T.
    GSI Helmholtzzentrum Schwerionenforsch GmbH, D-64291 Darmstadt, Germany..
    Hess, H.
    Univ Cologne, Inst Kernphys, Zulpicher Str 77, D-50937 Cologne, Germany..
    Isocrate, R.
    INFN Sez Padova, I-35131 Padua, Italy.;Univ Padua, Dipartimento Fis & Astron, I-35131 Padua, Italy..
    Iwanicki, J.
    Univ Warsaw, Heavy Ion Lab, Pasteura 5A, PL-02093 Warsaw, Poland..
    Jaworski, G.
    Univ Warsaw, Heavy Ion Lab, Pasteura 5A, PL-02093 Warsaw, Poland..
    Judson, D. S.
    Univ Liverpool, Oliver Lodge Lab, Liverpool L69 7ZE, Merseyside, England..
    Jungclaus, A.
    CSIC, Inst Estruct Mat, E-28006 Madrid, Spain..
    Karkour, N.
    CNRS, CSNSM, IN2P3, F-91405 Orsay, France..
    Kmiecik, M.
    Polish Acad Sci, Inst Nucl Phys, PL-31342 Krakow, Poland..
    Karpinski, D.
    Univ Warsaw, Fac Phys, PL-00681 Warsaw, Poland..
    Kisielinski, M.
    Univ Warsaw, Heavy Ion Lab, Pasteura 5A, PL-02093 Warsaw, Poland..
    Kondratyev, N.
    Flerov Lab Nucl React JINR, RU-141980 Dubna, Russia..
    Korichi, A.
    CNRS, CSNSM, IN2P3, F-91405 Orsay, France..
    Komorowska, M.
    Univ Warsaw, Heavy Ion Lab, Pasteura 5A, PL-02093 Warsaw, Poland.;Univ Warsaw, Fac Phys, PL-00681 Warsaw, Poland..
    Kowalczyk, M.
    Univ Warsaw, Heavy Ion Lab, Pasteura 5A, PL-02093 Warsaw, Poland..
    Korten, W.
    Univ Paris Saclay, CEA, Irfu, F-91191 Gif Sur Yvette, France..
    Krzysiek, M.
    Polish Acad Sci, Inst Nucl Phys, PL-31342 Krakow, Poland.;Horia Hulubei Natl Inst Phys & Nucl Engn, ELI NP, Magurele 077125, Romania..
    Lehaut, G.
    Univ Lyon 1, CNRS, IN2P3, IPN Lyon, F-69622 Villeurbanne, France..
    Leoni, S.
    INFN Sez Milano, I-20133 Milan, Italy.;Univ Milan, Dipartimento Fis, I-20133 Milan, Italy..
    Ljungvall, J.
    CNRS, CSNSM, IN2P3, F-91405 Orsay, France..
    Lopez-Martens, A.
    CNRS, CSNSM, IN2P3, F-91405 Orsay, France..
    Lunardi, S.
    INFN Sez Padova, I-35131 Padua, Italy.;Univ Padua, Dipartimento Fis & Astron, I-35131 Padua, Italy..
    Maron, G.
    INFN Lab Nazl Legnaro, Viale Univ 2, I-35020 Legnaro, Italy..
    Mazurek, K.
    Polish Acad Sci, Inst Nucl Phys, PL-31342 Krakow, Poland..
    Menegazzo, R.
    INFN Sez Padova, I-35131 Padua, Italy.;Univ Padua, Dipartimento Fis & Astron, I-35131 Padua, Italy..
    Mengoni, D.
    INFN Sez Padova, I-35131 Padua, Italy..
    Merchan, E.
    GSI Helmholtzzentrum Schwerionenforsch GmbH, D-64291 Darmstadt, Germany.;Tech Univ Darmstadt, D-64289 Darmstadt, Germany..
    Meczynski, W.
    Polish Acad Sci, Inst Nucl Phys, PL-31342 Krakow, Poland..
    Michelagnoli, C.
    INFN Sez Padova, I-35131 Padua, Italy.;Univ Padua, Dipartimento Fis & Astron, I-35131 Padua, Italy..
    Million, B.
    INFN Sez Milano, I-20133 Milan, Italy..
    Myalski, S.
    Polish Acad Sci, Inst Nucl Phys, PL-31342 Krakow, Poland..
    Napoli, D. R.
    INFN Lab Nazl Legnaro, Viale Univ 2, I-35020 Legnaro, Italy..
    Niikura, M.
    Inst Phys Nucl Orsay, F-91400 Orsay, France..
    Obertelli, A.
    Univ Paris Saclay, CEA, Irfu, F-91191 Gif Sur Yvette, France..
    Ozmen, S. F.
    Univ Warsaw, Heavy Ion Lab, Pasteura 5A, PL-02093 Warsaw, Poland..
    Palacz, M.
    Univ Warsaw, Heavy Ion Lab, Pasteura 5A, PL-02093 Warsaw, Poland..
    Prochniak, L.
    Univ Warsaw, Heavy Ion Lab, Pasteura 5A, PL-02093 Warsaw, Poland..
    Pullia, A.
    INFN Sez Milano, I-20133 Milan, Italy.;Univ Milan, Dipartimento Fis, I-20133 Milan, Italy..
    Quintana, B.
    Univ Salamanca, Dept Fis Fundamental, Lab Radiac Ionizantes, Salamanca, Spain..
    Rampazzo, G.
    INFN Lab Nazl Legnaro, Viale Univ 2, I-35020 Legnaro, Italy..
    Recchia, F.
    INFN Sez Padova, I-35131 Padua, Italy.;Univ Padua, Dipartimento Fis & Astron, I-35131 Padua, Italy..
    Redon, N.
    Univ Lyon 1, CNRS, IN2P3, IPN Lyon, F-69622 Villeurbanne, France..
    Reiter, P.
    Univ Cologne, Inst Kernphys, Zulpicher Str 77, D-50937 Cologne, Germany..
    Rosso, D.
    INFN Lab Nazl Legnaro, Viale Univ 2, I-35020 Legnaro, Italy..
    Rusek, K.
    Univ Warsaw, Heavy Ion Lab, Pasteura 5A, PL-02093 Warsaw, Poland..
    Sahin, E.
    INFN Lab Nazl Legnaro, Viale Univ 2, I-35020 Legnaro, Italy..
    Salsac, M-D
    Söderström, Pär-Anders
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Stefan, I.
    Inst Phys Nucl Orsay, F-91400 Orsay, France..
    Stezowski, O.
    Univ Lyon 1, CNRS, IN2P3, IPN Lyon, F-69622 Villeurbanne, France..
    Styczen, J.
    Polish Acad Sci, Inst Nucl Phys, PL-31342 Krakow, Poland..
    Theisen, Ch.
    Univ Paris Saclay, CEA, Irfu, F-91191 Gif Sur Yvette, France..
    Toniolo, N.
    INFN Lab Nazl Legnaro, Viale Univ 2, I-35020 Legnaro, Italy..
    Ur, C. A.
    INFN Sez Padova, I-35131 Padua, Italy.;Univ Padua, Dipartimento Fis & Astron, I-35131 Padua, Italy..
    Wadsworth, R.
    Univ York, Dept Phys, York YO10 5DD, N Yorkshire, England..
    Wasilewska, B.
    Polish Acad Sci, Inst Nucl Phys, PL-31342 Krakow, Poland..
    Wiens, A.
    Univ Cologne, Inst Kernphys, Zulpicher Str 77, D-50937 Cologne, Germany..
    Wood, J. L.
    Georgia Inst Technol, Sch Phys, Atlanta, GA 30332 USA..
    Wrzosek-Lipska, K.
    Univ Warsaw, Heavy Ion Lab, Pasteura 5A, PL-02093 Warsaw, Poland..
    Zieblinski, M.
    Polish Acad Sci, Inst Nucl Phys, PL-31342 Krakow, Poland..
    Quadrupole collectivity in Ca-42 from low-energy Coulomb excitation with AGATA2018In: Physical Review C: Covering Nuclear Physics, ISSN 2469-9985, E-ISSN 2469-9993, Vol. 97, no 2, article id 024326Article in journal (Refereed)
    Abstract [en]

    ACoulomb-excitation experiment to study electromagnetic properties of Ca-42 was performed using a 170-MeV calcium beam from the TANDEM XPU facility at INFN Laboratori Nazionali di Legnaro. gamma rays from excited states in Ca-42 were measured with the AGATA spectrometer. The magnitudes and relative signs of ten E2 matrix elements coupling six low-lying states in Ca-42, including the diagonal E2 matrix elements of 2(1)(+) and 2(2)(+) states, were determined using the least-squares code GOSIA. The obtained set of reduced E2 matrix elements was analyzed using the quadrupole sum rule method and yielded overall quadrupole deformation for 0(1),(+)(2) and 2(1,2)(+) states, as well as triaxiality for 0(1,2)(+) states, establishing the coexistence of a weakly deformed ground-state band and highly deformed slightly triaxial sideband in Ca-42. The experimental results were compared with the state-of-the-art large-scale shell-model and beyond-mean-field calculations, which reproduce well the general picture of shape coexistence in Ca-42.

  • 41.
    Hadynska-Klek, K.
    et al.
    Univ Warsaw, Heavy Ion Lab, Pasteura 5A, PL-02093 Warsaw, Poland.;Univ Warsaw, Fac Phys, PL-00681 Warsaw, Poland.;Univ Oslo, Dept Phys, N-0316 Oslo, Norway.;INFN Lab Nazl Legnaro, Viale Univ 2, I-35020 Legnaro, Italy.;Univ Surrey, Dept Phys, Guildford GU2 7XH, Surrey, England..
    Napiorkowski, P. J.
    Univ Warsaw, Heavy Ion Lab, Pasteura 5A, PL-02093 Warsaw, Poland..
    Zielinska, M.
    Univ Warsaw, Heavy Ion Lab, Pasteura 5A, PL-02093 Warsaw, Poland.;Univ Paris Saclay, CEA, Irfu, F-91191 Gif Sur Yvette, France..
    Srebrny, J.
    Univ Warsaw, Heavy Ion Lab, Pasteura 5A, PL-02093 Warsaw, Poland..
    Maj, A.
    Polish Acad Sci, Inst Nucl Phys, PL-31342 Krakow, Poland..
    Azaiez, F.
    Inst Phys Nucl Orsay, F-91400 Orsay, France..
    Dobon, J. J. Valiente
    INFN Lab Nazl Legnaro, Viale Univ 2, I-35020 Legnaro, Italy..
    Kicinska-Habior, M.
    Univ Warsaw, Fac Phys, PL-00681 Warsaw, Poland..
    Nowacki, F.
    Univ Strasbourg, IPHC, CNRS, UMR7178, 23 Rue Loess, F-67037 Strasbourg, France..
    Naidja, H.
    Univ Strasbourg, IPHC, CNRS, UMR7178, 23 Rue Loess, F-67037 Strasbourg, France.;GSI Helmholtzzentrum Schwerionenforsch GmbH, D-64291 Darmstadt, Germany.;Univ Constantine 1, LPMS, Route Ain El Bey, Constantine 25000, Algeria..
    Bounthong, B.
    Univ Strasbourg, IPHC, CNRS, UMR7178, 23 Rue Loess, F-67037 Strasbourg, France..
    Rodriguez, T. R.
    Univ Autonoma Madrid, Dept Fis Teor, Madrid, Spain..
    de Angelis, G.
    INFN Lab Nazl Legnaro, Viale Univ 2, I-35020 Legnaro, Italy..
    Abraham, T.
    Univ Warsaw, Heavy Ion Lab, Pasteura 5A, PL-02093 Warsaw, Poland..
    Kumar, G. Anil
    Polish Acad Sci, Inst Nucl Phys, PL-31342 Krakow, Poland..
    Bazzacco, D.
    INFN Sez Padova, I-35131 Padua, Italy.;Univ Padua, Dipartimento Fis & Astron, I-35131 Padua, Italy..
    Bellato, M.
    INFN Sez Padova, I-35131 Padua, Italy..
    Bortolato, D.
    INFN Sez Padova, I-35131 Padua, Italy..
    Bednarczyk, P.
    Polish Acad Sci, Inst Nucl Phys, PL-31342 Krakow, Poland..
    Benzoni, G.
    INFN Sez Milano, I-20133 Milan, Italy..
    Berti, L.
    INFN Lab Nazl Legnaro, Viale Univ 2, I-35020 Legnaro, Italy..
    Birkenbach, B.
    Univ Cologne, Inst Kernphys, Zulpicher Str 77, D-50937 Cologne, Germany..
    Bruyneel, B.
    Univ Cologne, Inst Kernphys, Zulpicher Str 77, D-50937 Cologne, Germany..
    Brambilla, S.
    INFN Sez Milano, I-20133 Milan, Italy..
    Camera, F.
    INFN Sez Milano, I-20133 Milan, Italy.;Univ Milan, Dipartimento Fis, I-20133 Milan, Italy..
    Chavas, J.
    Univ Paris Saclay, CEA, Irfu, F-91191 Gif Sur Yvette, France..
    Cederwall, Bo
    KTH, School of Engineering Sciences (SCI), Physics. Royal Inst Technol, Dept Phys, SE-10691 Stockholm, Sweden..
    Charles, L.
    Univ Strasbourg, IPHC, CNRS, UMR7178, 23 Rue Loess, F-67037 Strasbourg, France..
    Ciemala, M.
    Polish Acad Sci, Inst Nucl Phys, PL-31342 Krakow, Poland..
    Cocconi, P.
    INFN Lab Nazl Legnaro, Viale Univ 2, I-35020 Legnaro, Italy..
    Coleman-Smith, P.
    Daresbury Lab, Warrington WA4 4AD, Cheshire, England..
    Colombo, A.
    INFN Sez Padova, I-35131 Padua, Italy..
    Corsi, A.
    INFN Sez Milano, I-20133 Milan, Italy.;Univ Milan, Dipartimento Fis, I-20133 Milan, Italy..
    Crespi, F. C. L.
    INFN Sez Milano, I-20133 Milan, Italy.;Univ Milan, Dipartimento Fis, I-20133 Milan, Italy..
    Cullen, D. M.
    Univ Manchester, Sch Phys & Astron, Schuster Lab, Manchester M13 9PL, Lancs, England..
    Czermak, A.
    Polish Acad Sci, Inst Nucl Phys, PL-31342 Krakow, Poland..
    Desesquelles, P.
    Univ Paris 11, F-91400 Orsay, France.;CNRS, CSNSM, IN2P3, F-91405 Orsay, France..
    Doherty, D. T.
    Univ Surrey, Dept Phys, Guildford GU2 7XH, Surrey, England.;Univ Paris Saclay, CEA, Irfu, F-91191 Gif Sur Yvette, France.;Univ York, Dept Phys, York YO10 5DD, N Yorkshire, England..
    Dulny, B.
    Polish Acad Sci, Inst Nucl Phys, PL-31342 Krakow, Poland..
    Eberth, J.
    Univ Cologne, Inst Kernphys, Zulpicher Str 77, D-50937 Cologne, Germany..
    Farnea, E.
    INFN Sez Padova, I-35131 Padua, Italy.;Univ Padua, Dipartimento Fis & Astron, I-35131 Padua, Italy..
    Fornal, B.
    Polish Acad Sci, Inst Nucl Phys, PL-31342 Krakow, Poland..
    Franchoo, S.
    Inst Phys Nucl Orsay, F-91400 Orsay, France..
    Gadea, A.
    Univ Valencia, CSIC, Inst Fis Corpuscular IFIC, S-46980 Valencia, Spain..
    Giaz, A.
    INFN Sez Milano, I-20133 Milan, Italy.;Univ Milan, Dipartimento Fis, I-20133 Milan, Italy..
    Gottardo, A.
    INFN Lab Nazl Legnaro, Viale Univ 2, I-35020 Legnaro, Italy..
    Grave, X.
    Inst Phys Nucl Orsay, F-91400 Orsay, France..
    Grebosz, J.
    Polish Acad Sci, Inst Nucl Phys, PL-31342 Krakow, Poland..
    Gorgen, A.
    Univ Oslo, Dept Phys, N-0316 Oslo, Norway..
    Gulmini, M.
    INFN Lab Nazl Legnaro, Viale Univ 2, I-35020 Legnaro, Italy..
    Habermann, T.
    GSI Helmholtzzentrum Schwerionenforsch GmbH, D-64291 Darmstadt, Germany..
    Hess, H.
    Univ Cologne, Inst Kernphys, Zulpicher Str 77, D-50937 Cologne, Germany..
    Isocrate, R.
    INFN Sez Padova, I-35131 Padua, Italy.;Univ Padua, Dipartimento Fis & Astron, I-35131 Padua, Italy..
    Iwanicki, J.
    Univ Warsaw, Heavy Ion Lab, Pasteura 5A, PL-02093 Warsaw, Poland..
    Jaworski, G.
    Univ Warsaw, Heavy Ion Lab, Pasteura 5A, PL-02093 Warsaw, Poland..
    Judson, D. S.
    Univ Liverpool, Oliver Lodge Lab, Liverpool L69 7ZE, Merseyside, England..
    Jungclaus, A.
    CSIC, Inst Estruct Mat, E-28006 Madrid, Spain..
    Karkour, N.
    CNRS, CSNSM, IN2P3, F-91405 Orsay, France..
    Kmiecik, M.
    Polish Acad Sci, Inst Nucl Phys, PL-31342 Krakow, Poland..
    Karpinski, D.
    Univ Warsaw, Fac Phys, PL-00681 Warsaw, Poland..
    Kisielinski, M.
    Univ Warsaw, Heavy Ion Lab, Pasteura 5A, PL-02093 Warsaw, Poland..
    Kondratyev, N.
    Flerov Lab Nucl React JINR, RU-141980 Dubna, Russia..
    Korichi, A.
    CNRS, CSNSM, IN2P3, F-91405 Orsay, France..
    Komorowska, M.
    Univ Warsaw, Heavy Ion Lab, Pasteura 5A, PL-02093 Warsaw, Poland.;Univ Warsaw, Fac Phys, PL-00681 Warsaw, Poland..
    Kowalczyk, M.
    Univ Warsaw, Heavy Ion Lab, Pasteura 5A, PL-02093 Warsaw, Poland..
    Korten, W.
    Univ Paris Saclay, CEA, Irfu, F-91191 Gif Sur Yvette, France..
    Krzysiek, M.
    Polish Acad Sci, Inst Nucl Phys, PL-31342 Krakow, Poland.;Horia Hulubei Natl Inst Phys & Nucl Engn, ELI NP, Magurele 077125, Romania..
    Lehaut, G.
    Univ Lyon 1, CNRS, IN2P3, IPN Lyon, F-69622 Villeurbanne, France..
    Leoni, S.
    INFN Sez Milano, I-20133 Milan, Italy.;Univ Milan, Dipartimento Fis, I-20133 Milan, Italy..
    Ljungvall, J.
    CNRS, CSNSM, IN2P3, F-91405 Orsay, France..
    Lopez-Martens, A.
    CNRS, CSNSM, IN2P3, F-91405 Orsay, France..
    Lunardi, S.
    INFN Sez Padova, I-35131 Padua, Italy.;Univ Padua, Dipartimento Fis & Astron, I-35131 Padua, Italy..
    Maron, G.
    INFN Lab Nazl Legnaro, Viale Univ 2, I-35020 Legnaro, Italy..
    Mazurek, K.
    Polish Acad Sci, Inst Nucl Phys, PL-31342 Krakow, Poland..
    Menegazzo, R.
    INFN Sez Padova, I-35131 Padua, Italy.;Univ Padua, Dipartimento Fis & Astron, I-35131 Padua, Italy..
    Mengoni, D.
    INFN Sez Padova, I-35131 Padua, Italy..
    Merchan, E.
    GSI Helmholtzzentrum Schwerionenforsch GmbH, D-64291 Darmstadt, Germany.;Tech Univ Darmstadt, D-64289 Darmstadt, Germany..
    Meczynski, W.
    Polish Acad Sci, Inst Nucl Phys, PL-31342 Krakow, Poland..
    Michelagnoli, C.
    INFN Sez Padova, I-35131 Padua, Italy.;Univ Padua, Dipartimento Fis & Astron, I-35131 Padua, Italy..
    Million, B.
    INFN Sez Milano, I-20133 Milan, Italy..
    Myalski, S.
    Polish Acad Sci, Inst Nucl Phys, PL-31342 Krakow, Poland..
    Napoli, D. R.
    INFN Lab Nazl Legnaro, Viale Univ 2, I-35020 Legnaro, Italy..
    Niikura, M.
    Inst Phys Nucl Orsay, F-91400 Orsay, France..
    Obertelli, A.
    Univ Paris Saclay, CEA, Irfu, F-91191 Gif Sur Yvette, France..
    Ozmen, S. F.
    Univ Warsaw, Heavy Ion Lab, Pasteura 5A, PL-02093 Warsaw, Poland..
    Palacz, M.
    Univ Warsaw, Heavy Ion Lab, Pasteura 5A, PL-02093 Warsaw, Poland..
    Prochniak, L.
    Univ Warsaw, Heavy Ion Lab, Pasteura 5A, PL-02093 Warsaw, Poland..
    Pullia, A.
    INFN Sez Milano, I-20133 Milan, Italy.;Univ Milan, Dipartimento Fis, I-20133 Milan, Italy..
    Quintana, B.
    Univ Salamanca, Dept Fis Fundamental, Lab Radiac Ionizantes, Salamanca, Spain..
    Rampazzo, G.
    INFN Lab Nazl Legnaro, Viale Univ 2, I-35020 Legnaro, Italy..
    Recchia, F.
    INFN Sez Padova, I-35131 Padua, Italy.;Univ Padua, Dipartimento Fis & Astron, I-35131 Padua, Italy..
    Redon, N.
    Univ Lyon 1, CNRS, IN2P3, IPN Lyon, F-69622 Villeurbanne, France..
    Reiter, P.
    Univ Cologne, Inst Kernphys, Zulpicher Str 77, D-50937 Cologne, Germany..
    Rosso, D.
    INFN Lab Nazl Legnaro, Viale Univ 2, I-35020 Legnaro, Italy..
    Rusek, K.
    Univ Warsaw, Heavy Ion Lab, Pasteura 5A, PL-02093 Warsaw, Poland..
    Sahin, E.
    INFN Lab Nazl Legnaro, Viale Univ 2, I-35020 Legnaro, Italy..
    Salsac, M-D
    Soderstrom, P-A
    Stefan, I.
    Inst Phys Nucl Orsay, F-91400 Orsay, France..
    Stezowski, O.
    Univ Lyon 1, CNRS, IN2P3, IPN Lyon, F-69622 Villeurbanne, France..
    Styczen, J.
    Polish Acad Sci, Inst Nucl Phys, PL-31342 Krakow, Poland..
    Theisen, Ch.
    Univ Paris Saclay, CEA, Irfu, F-91191 Gif Sur Yvette, France..
    Toniolo, N.
    INFN Lab Nazl Legnaro, Viale Univ 2, I-35020 Legnaro, Italy..
    Ur, C. A.
    INFN Sez Padova, I-35131 Padua, Italy.;Univ Padua, Dipartimento Fis & Astron, I-35131 Padua, Italy..
    Wadsworth, R.
    Univ York, Dept Phys, York YO10 5DD, N Yorkshire, England..
    Wasilewska, B.
    Polish Acad Sci, Inst Nucl Phys, PL-31342 Krakow, Poland..
    Wiens, A.
    Univ Cologne, Inst Kernphys, Zulpicher Str 77, D-50937 Cologne, Germany..
    Wood, J. L.
    Georgia Inst Technol, Sch Phys, Atlanta, GA 30332 USA..
    Wrzosek-Lipska, K.
    Univ Warsaw, Heavy Ion Lab, Pasteura 5A, PL-02093 Warsaw, Poland..
    Zieblinski, M.
    Polish Acad Sci, Inst Nucl Phys, PL-31342 Krakow, Poland..
    Quadrupole collectivity in Ca-42 from low-energy Coulomb excitation with AGATA2018In: Physical Review C: Covering Nuclear Physics, ISSN 2469-9985, E-ISSN 2469-9993, Vol. 97, no 2, article id 024326Article in journal (Refereed)
    Abstract [en]

    ACoulomb-excitation experiment to study electromagnetic properties of Ca-42 was performed using a 170-MeV calcium beam from the TANDEM XPU facility at INFN Laboratori Nazionali di Legnaro. gamma rays from excited states in Ca-42 were measured with the AGATA spectrometer. The magnitudes and relative signs of ten E2 matrix elements coupling six low-lying states in Ca-42, including the diagonal E2 matrix elements of 2(1)(+) and 2(2)(+) states, were determined using the least-squares code GOSIA. The obtained set of reduced E2 matrix elements was analyzed using the quadrupole sum rule method and yielded overall quadrupole deformation for 0(1),(+)(2) and 2(1,2)(+) states, as well as triaxiality for 0(1,2)(+) states, establishing the coexistence of a weakly deformed ground-state band and highly deformed slightly triaxial sideband in Ca-42. The experimental results were compared with the state-of-the-art large-scale shell-model and beyond-mean-field calculations, which reproduce well the general picture of shape coexistence in Ca-42.

  • 42.
    Haefner, G.
    et al.
    Univ Cologne, Inst Kernphys, D-50937 Cologne, Germany;Univ Paris Saclay, CNRS IN2P3, CSNSM, Orsay Campus, F-91405 Orsay, France.
    Moschner, K.
    Univ Cologne, Inst Kernphys, D-50937 Cologne, Germany.
    Blazhev, A.
    Univ Cologne, Inst Kernphys, D-50937 Cologne, Germany.
    Boutachkov, P.
    GSI Helmholtzzentrum Schwerionenforsch GmbH, D-62491 Darmstadt, Germany.
    Davies, P. J.
    Univ York, Dept Phys, York YO10 5DD, N Yorkshire, England.
    Wadsworth, R.
    Univ York, Dept Phys, York YO10 5DD, N Yorkshire, England.
    Ameil, F.
    GSI Helmholtzzentrum Schwerionenforsch GmbH, D-62491 Darmstadt, Germany.
    Baba, H.
    RIKEN, Nishina Ctr, Wako, Saitama 3510198, Japan.
    Back, T.
    KTH Stockholm, Dept Phys, SE-10044 Stockholm, Sweden.
    Dewald, M.
    Univ Cologne, Inst Kernphys, D-50937 Cologne, Germany.
    Doornenbal, P.
    RIKEN, Nishina Ctr, Wako, Saitama 3510198, Japan.
    Faestermann, T.
    Tech Univ Munich, Phys Dept, D-80333 Munich, Germany.
    Gengelbach, Aila
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Gerl, J.
    GSI Helmholtzzentrum Schwerionenforsch GmbH, D-62491 Darmstadt, Germany.
    Gernhaeuser, R.
    Tech Univ Munich, Phys Dept, D-80333 Munich, Germany.
    Go, S.
    Univ Tokyo, Dept Phys, Tokyo 1138654, Japan.
    Gorska, M.
    GSI Helmholtzzentrum Schwerionenforsch GmbH, D-62491 Darmstadt, Germany.
    Grawe, H.
    GSI Helmholtzzentrum Schwerionenforsch GmbH, D-62491 Darmstadt, Germany.
    Gregor, E.
    Tech Univ Darmstadt, Inst Kernphys, D-64289 Darmstadt, Germany.
    Hotaka, H.
    Tokyo Univ Sci, Dept Phys, Chiba 2788510, Japan.
    Isobe, T.
    RIKEN, Nishina Ctr, Wako, Saitama 3510198, Japan.
    Jenkins, D. G.
    Univ York, Dept Phys, York YO10 5DD, N Yorkshire, England.
    Jolie, J.
    Univ Cologne, Inst Kernphys, D-50937 Cologne, Germany.
    Jung, H. S.
    Chung Ang Univ, Dept Phys, Seoul 156756, South Korea.
    Kojouharov, I
    GSI Helmholtzzentrum Schwerionenforsch GmbH, D-62491 Darmstadt, Germany.
    Kurz, N.
    GSI Helmholtzzentrum Schwerionenforsch GmbH, D-62491 Darmstadt, Germany.
    Lewitowicz, M.
    CEA DSM CNRS IN2P3, GANIL, F-14076 Caen, France.
    Lorusso, G.
    RIKEN, Nishina Ctr, Wako, Saitama 3510198, Japan.
    Lozeva, R.
    Univ Paris Saclay, CNRS IN2P3, CSNSM, Orsay Campus, F-91405 Orsay, France.
    Merchan, E.
    Tech Univ Darmstadt, Inst Kernphys, D-64289 Darmstadt, Germany.
    Naqvi, F.
    Yale Univ, Dept Phys, New Haven, CT 06520 USA;Yale Univ, Wright Nucl Struct Lab, New Haven, CT 06520 USA.
    Nishibata, H.
    Osaka Univ, Dept Phys, Osaka 5600043, Japan.
    Nishimura, D.
    Tokyo City Univ, Dept Phys, Tokyo 1588557, Japan.
    Nishimura, S.
    RIKEN, Nishina Ctr, Wako, Saitama 3510198, Japan.
    Pietralla, N.
    Tech Univ Darmstadt, Inst Kernphys, D-64289 Darmstadt, Germany.
    Schaffner, H.
    GSI Helmholtzzentrum Schwerionenforsch GmbH, D-62491 Darmstadt, Germany.
    Soderstrom, P-A
    RIKEN, Nishina Ctr, Wako, Saitama 3510198, Japan.
    Steiger, K.
    Tech Univ Munich, Phys Dept, D-80333 Munich, Germany.
    Sumikama, T.
    Tohoku Univ, Fac Sci, Dept Phys, Sendai, Miyagi 9808578, Japan.
    Taprogge, J.
    CSIC Madrid, Inst Struct Matter, ES-28006 Madrid, Spain;Univ Autonoma Madrid, ES-28049 Madrid, Spain.
    Thoele, P.
    Univ Cologne, Inst Kernphys, D-50937 Cologne, Germany.
    Watanbe, H.
    Beihang Univ, Dept Phys, Beijing 100083, Peoples R China.
    Warr, N.
    Univ Cologne, Inst Kernphys, D-50937 Cologne, Germany.
    Werner, V
    Tech Univ Darmstadt, Inst Kernphys, D-64289 Darmstadt, Germany;Yale Univ, Dept Phys, New Haven, CT 06520 USA;Yale Univ, Wright Nucl Struct Lab, New Haven, CT 06520 USA.
    Xu, Z. Y.
    Univ Tokyo, Dept Phys, Tokyo 1138654, Japan.
    Yagi, A.
    Osaka Univ, Dept Phys, Osaka 5600043, Japan.
    Yoshinaga, K.
    Tokyo Univ Sci, Dept Phys, Chiba 2788510, Japan.
    Zhu, Y.
    Tokyo Univ Sci, Dept Phys, Chiba 2788510, Japan.
    Properties of gamma-decaying isomers in the Sn-100 region populated in fragmentation of a Xe-124 beam2019In: Physical Review C: Covering Nuclear Physics, ISSN 2469-9985, E-ISSN 2469-9993, Vol. 100, no 2, article id 024302Article in journal (Refereed)
    Abstract [en]

    A systematic study was performed of microsecond gamma-decaying isomers around Sn-100 produced in a fragmentation reaction of a Xe-124 beam at 345 MeV/u at the Radioactive Ion Beam Factory of the RIKEN Nishina Center in Saitama, Japan. Half-lives of isomeric states in that region were remeasured allowing us to improve the currently available experimental information. Reduced transition probabilities were deduced and compared to shell-model calculations in various model spaces. The recently reported low-energy transitions in Rh-92 and Ag-96 were remeasured with improved precision. Additionally, experimental information on isomeric ratios, including five new ones, were extracted and compared to a previous experimental study and the sharp cutoff model of fragmentation reaction.

  • 43. Herzan, A.
    et al.
    Juutinen, S.
    Auranen, K.
    Grahn, T.
    Greenlees, P. T.
    Hauschild, K.
    Jakobsson, Ulrika
    KTH, School of Engineering Sciences (SCI), Physics. University of Jyväskylä, Finland.
    Julin, R.
    Ketelhut, S.
    Leino, M.
    Lopez-Martens, A.
    Lonnroth, T.
    Nieminen, P.
    Nyman, M.
    Partanen, J.
    Peura, P.
    Rahkila, P.
    Ruotsalainen, P.
    Sandzelius, M.
    Saren, J.
    Scholey, C.
    Slotte, J. M. K.
    Sorri, J.
    Stolze, S.
    Uusitalo, J.
    Detailed spectroscopy of Bi-1952017In: Physical Review C: Covering Nuclear Physics, ISSN 2469-9985, E-ISSN 2469-9993, Vol. 96, no 1, article id 014301Article in journal (Refereed)
    Abstract [en]

    An experiment focused on the study of shape coexistence and new high-spin structures in Bi-195 has been performed. The nucleus is in a transitional region of the bismuth isotope chain. A large number of new states have been found, resulting in a significant extension of the previously known level scheme. Several new collective structures have been identified. A strongly coupled rotational band built upon the 13/2(+) isomeric state was extended up to I-pi = (49/2(+)) and an energy of 5706 keV. The I-pi = 31/2(+) member of the pi i(13/2) band was also found to feed a new long-lived isomeric state with an excitation energy of 2616 keV and a spin and parity of I-pi = 29/2(+). The half-life of the 29/2+ isomeric state was determined to be 1.49(1) mu s. It decays via the emission of 457-keV E2 and 236-keV E1 transitions, respectively. A low-energy 46-keV E2 transition has been identified to depopulate the (29/(2-)) isomeric state, with a measured half-life of T-1/2 = 614(5) ns. This transition allows the excitation energy of the isomeric state to be determined as 2381 keV. The feeding patterns of both 29/2(+) and (29/2(-)) isomeric states have also been described. This is the first time collective structures have also been observed up to high spins and excitation energies in the neutron-deficient Bi-195 nucleus. Evidence for the manifestation of shape coexistence in Bi-195 is also discussed.

  • 44. Hinde, D. J.
    et al.
    Jeung, D. Y.
    Prasad, E.
    Wakhle, A.
    Dasgupta, M.
    Evers, M.
    Luong, D. H.
    Du Rietz, Rickard
    Simenel, C.
    Simpson, E. C.
    Williams, E.
    Sub-barrier quasifission in heavy element formation reactions with deformed actinide target nuclei2018In: Physical Review C: Covering Nuclear Physics, ISSN 2469-9985, E-ISSN 2469-9993, Vol. 97, no 2Article in journal (Refereed)
    Abstract [en]

    Background: The formation of superheavy elements (SHEs) by fusion of two massive nuclei is severely inhibited by the competing quasifission process. Lowexcitation energies favor SHE survival against fusion-fission competition. In "cold" fusion with spherical target nuclei near Pb-208, SHE yields are largest at beam energies significantly below the average capture barrier. In "hot" fusion with statically deformed actinide nuclei, this is not the case. Here the elongated deformation-aligned configurations in sub-barrier capture reactions inhibits fusion (formation of a compact compound nucleus), instead favoring rapid reseparation through quasifission. Purpose: To determine the probabilities of fast and slow quasifission in reactions with prolate statically deformed actinide nuclei, through measurement and quantitative analysis of the dependence of quasifission characteristics at beam energies spanning the average capture barrier energy. Methods: The Australian National University Heavy Ion Accelerator Facility and CUBE fission spectrometer have been used to measure fission and quasifission mass and angle distributions for reactions with projectiles from C to S, bombarding Th and U target nuclei. Results: Mass-asymmetric quasifission occurring on a fast time scale, associated with collisions with the tips of the prolate actinide nuclei, shows a rapid increase in probability with increasing projectile charge, the transition being centered around projectile atomic number ZP = 14. For mass-symmetric fission events, deviations of angular anisotropies from expectations for fusion fission, indicating a component of slower quasifission, suggest a similar transition, but centered around ZP similar to 8. Conclusions: Collisions with the tips of statically deformed prolate actinide nuclei show evidence for two distinct quasifission processes of different time scales. Their probabilities both increase rapidly with the projectile charge. The probability of fusion can be severely suppressed by these two quasifission processes, since the sub-barrier heavy element yield is likely to be determined by the product of the probabilities of surviving each quasifission process.

  • 45. Häfner, G.
    et al.
    Moschner, K.
    Blazhev, A.
    Boutachkov, P.
    Davies, P. J.
    Wadsworth, R.
    Ameil, F.
    Baba, H.
    Bäck, Torbjörn
    KTH, School of Engineering Sciences (SCI), Physics, Nuclear Physics.
    Dewald, M.
    Doornenbal, P.
    Faestermann, T.
    Gengelbach, A.
    Gerl, J.
    Gernhaüser, R.
    Go, S.
    Górska, M.
    Grawe, H.
    Gregor, E.
    Hotaka, H.
    Isobe, T.
    Jenkins, D. G.
    Jolie, J.
    Jung, H. S.
    Kojouharov, I.
    Kurz, N.
    Lewitowicz, M.
    Lorusso, G.
    Lozeva, R.
    Merchan, E.
    Naqvi, F.
    Nishibata, H.
    Nishimura, D.
    Nishimura, S.
    Pietralla, N.
    Schaffner, H.
    Söderström, P. -A
    Steiger, K.
    Sumikama, T.
    Taprogge, J.
    Thöle, P.
    Watanbe, H.
    Warr, N.
    Werner, V.
    Xu, Z. Y.
    Yagi, A.
    Yoshinaga, K.
    Zhu, Y.
    Properties of γ-decaying isomers in the Sn 100 region populated in fragmentation of a Xe 124 beam2019In: Physical Review C: Covering Nuclear Physics, ISSN 2469-9985, E-ISSN 2469-9993, Vol. 100, no 2, article id 024302Article in journal (Refereed)
    Abstract [en]

    A systematic study was performed of microsecond γ-decaying isomers around Sn100 produced in a fragmentation reaction of a Xe124 beam at 345 MeV/u at the Radioactive Ion Beam Factory of the RIKEN Nishina Center in Saitama, Japan. Half-lives of isomeric states in that region were remeasured allowing us to improve the currently available experimental information. Reduced transition probabilities were deduced and compared to shell-model calculations in various model spaces. The recently reported low-energy transitions in Rh92 and Ag96 were remeasured with improved precision. Additionally, experimental information on isomeric ratios, including five new ones, were extracted and compared to a previous experimental study and the sharp cutoff model of fragmentation reaction.

  • 46.
    John, P. R.
    et al.
    Univ Padua, Dipartimento Fis & Astron, I-35131 Padua, Italy.;Ist Nazl Fis Nucl, Sez Padova, I-35131 Padua, Italy.;Tech Univ Darmstadt, Inst Kernphys, D-64289 Darmstadt, Germany..
    Valiente-Dobon, J. J.
    Ist Nazl Fis Nucl, Lab Nazl Legnaro, I-35020 Legnaro, Italy..
    Mengoni, D.
    Univ Padua, Dipartimento Fis & Astron, I-35131 Padua, Italy.;Ist Nazl Fis Nucl, Sez Padova, I-35131 Padua, Italy..
    Modamio, V.
    Ist Nazl Fis Nucl, Lab Nazl Legnaro, I-35020 Legnaro, Italy.;Univ Oslo, Dept Phys, POB 1048 Blindern, N-0316 Oslo, Norway..
    Lunardi, S.
    Univ Padua, Dipartimento Fis & Astron, I-35131 Padua, Italy.;Ist Nazl Fis Nucl, Sez Padova, I-35131 Padua, Italy..
    Bazzacco, D.
    Ist Nazl Fis Nucl, Sez Padova, I-35131 Padua, Italy..
    Gadea, A.
    Univ Valencia, CSIC, Inst Fis Corpuscular, E-46980 Valencia, Spain..
    Wheldon, C.
    Univ Birmingham, Sch Phys & Astron, Birmingham B15 2TT, W Midlands, England..
    Rodriguez, T. R.
    Tech Univ Darmstadt, Inst Kernphys, D-64289 Darmstadt, Germany.;Univ Autonoma Madrid, Dept Fis Teor, E-28049 Madrid, Spain..
    Alexander, T.
    Univ Surrey, Dept Phys, Guildford GU2 7XH, Surrey, England..
    de Angelis, G.
    Ist Nazl Fis Nucl, Lab Nazl Legnaro, I-35020 Legnaro, Italy..
    Ashwood, N.
    Univ Birmingham, Sch Phys & Astron, Birmingham B15 2TT, W Midlands, England..
    Barr, M.
    Univ Birmingham, Sch Phys & Astron, Birmingham B15 2TT, W Midlands, England..
    Benzoni, G.
    Univ Milan, Dipartimento Fis, I-20133 Milan, Italy.;Ist Nazl Fis Nucl, Sez Milano, I-20133 Milan, Italy..
    Birkenbach, B.
    Univ Cologne, Inst Kernphys, D-50937 Cologne, Germany..
    Bizzeti, P. G.
    Univ Firenze, Dipartimento Fis, I-50019 Florence, Italy.;Ist Nazl Fis Nucl, Sez Firenze, I-50019 Florence, Italy..
    Bizzeti-Sona, A. M.
    Univ Firenze, Dipartimento Fis, I-50019 Florence, Italy.;Ist Nazl Fis Nucl, Sez Firenze, I-50019 Florence, Italy..
    Bottoni, S.
    Univ Milan, Dipartimento Fis, I-20133 Milan, Italy.;Ist Nazl Fis Nucl, Sez Milano, I-20133 Milan, Italy.;Argonne Natl Lab, Div Phys, Argonne, IL 60439 USA..
    Bowry, M.
    Univ Surrey, Dept Phys, Guildford GU2 7XH, Surrey, England..
    Bracco, A.
    Univ Milan, Dipartimento Fis, I-20133 Milan, Italy.;Ist Nazl Fis Nucl, Sez Milano, I-20133 Milan, Italy..
    Browne, F.
    Univ Brighton, Sch Comp Engn & Math, Brighton BN2 4GJ, E Sussex, England..
    Bunce, M.
    Univ Surrey, Dept Phys, Guildford GU2 7XH, Surrey, England..
    Camera, F.
    Univ Milan, Dipartimento Fis, I-20133 Milan, Italy.;Ist Nazl Fis Nucl, Sez Milano, I-20133 Milan, Italy..
    Corradi, L.
    Ist Nazl Fis Nucl, Lab Nazl Legnaro, I-35020 Legnaro, Italy..
    Crespi, F. C. L.
    Univ Milan, Dipartimento Fis, I-20133 Milan, Italy.;Ist Nazl Fis Nucl, Sez Milano, I-20133 Milan, Italy..
    Melon, B.
    Univ Firenze, Dipartimento Fis, I-50019 Florence, Italy.;Ist Nazl Fis Nucl, Sez Firenze, I-50019 Florence, Italy..
    Farnea, E.
    Ist Nazl Fis Nucl, Sez Padova, I-35131 Padua, Italy..
    Fioretto, E.
    Ist Nazl Fis Nucl, Lab Nazl Legnaro, I-35020 Legnaro, Italy..
    Gottardo, A.
    Univ Padua, Dipartimento Fis & Astron, I-35131 Padua, Italy.;Ist Nazl Fis Nucl, Lab Nazl Legnaro, I-35020 Legnaro, Italy.;IN2P3, CNRS, CSNSM, Orsay Campus, F-91405 Orsay, France.;Univ Paris 11, Orsay Campus, F-91405 Orsay, France..
    Grente, L.
    Ctr CEA Saclay, CEA, DSM, Inst Rech Lois Fondament Univers IRFU, F-91191 Gif Sur Yvette, France..
    Hess, H.
    Univ Cologne, Inst Kernphys, D-50937 Cologne, Germany..
    Kokalova, Tz.
    Univ Birmingham, Sch Phys & Astron, Birmingham B15 2TT, W Midlands, England..
    Korten, W.
    Ctr CEA Saclay, CEA, DSM, Inst Rech Lois Fondament Univers IRFU, F-91191 Gif Sur Yvette, France..
    Kusoglu, A.
    Istanbul Univ, Fac Sci, Dept Phys, TR-34134 Istanbul, Turkey.;Horia Hulubei Natl Inst Phys & Nucl Engn, ELI, NP, Magurele 077125, Romania..
    Lenzi, S.
    Univ Padua, Dipartimento Fis & Astron, I-35131 Padua, Italy.;Ist Nazl Fis Nucl, Sez Padova, I-35131 Padua, Italy..
    Leoni, S.
    Univ Milan, Dipartimento Fis, I-20133 Milan, Italy.;Ist Nazl Fis Nucl, Sez Milano, I-20133 Milan, Italy..
    Ljungvall, J.
    IN2P3, CNRS, CSNSM, Orsay Campus, F-91405 Orsay, France.;Univ Paris 11, Orsay Campus, F-91405 Orsay, France..
    Menegazzo, R.
    Univ Padua, Dipartimento Fis & Astron, I-35131 Padua, Italy.;Ist Nazl Fis Nucl, Sez Padova, I-35131 Padua, Italy..
    Michelagnoli, C.
    Univ Padua, Dipartimento Fis & Astron, I-35131 Padua, Italy.;Ist Nazl Fis Nucl, Sez Padova, I-35131 Padua, Italy.;CEA, DSM, CNRS, IN2P3,GANIL, F-14076 Caen, France..
    Mijatovic, T.
    Inst Ruder Boskovic, HR-10000 Zagreb, Croatia..
    Montagnoli, G.
    Univ Padua, Dipartimento Fis & Astron, I-35131 Padua, Italy.;Ist Nazl Fis Nucl, Sez Padova, I-35131 Padua, Italy..
    Montanari, D.
    Univ Padua, Dipartimento Fis & Astron, I-35131 Padua, Italy.;Ist Nazl Fis Nucl, Sez Padova, I-35131 Padua, Italy.;Univ Strasbourg, USIAS, IPHC, CNRS, F-67037 Strasbourg 2, France..
    Napoli, D. R.
    Ist Nazl Fis Nucl, Lab Nazl Legnaro, I-35020 Legnaro, Italy..
    Podolyak, Zs.
    Univ Surrey, Dept Phys, Guildford GU2 7XH, Surrey, England..
    Pollarolo, G.
    Univ Torino, Dipartimento Fis Teor, I-10125 Turin, Italy.;Ist Nazl Fis Nucl, Sez Torino, I-10125 Turin, Italy..
    Recchia, F.
    Univ Padua, Dipartimento Fis & Astron, I-35131 Padua, Italy.;Ist Nazl Fis Nucl, Sez Padova, I-35131 Padua, Italy..
    Reiter, P.
    Univ Cologne, Inst Kernphys, D-50937 Cologne, Germany..
    Roberts, O. J.
    Univ Brighton, Sch Comp Engn & Math, Brighton BN2 4GJ, E Sussex, England.;Univ York, York YO10 5DD, N Yorkshire, England..
    Sahin, E.
    Ist Nazl Fis Nucl, Lab Nazl Legnaro, I-35020 Legnaro, Italy.;Univ Oslo, Dept Phys, POB 1048 Blindern, N-0316 Oslo, Norway..
    Salsac, M. -D
    Scarlassara, F.
    Univ Padua, Dipartimento Fis & Astron, I-35131 Padua, Italy.;Ist Nazl Fis Nucl, Sez Padova, I-35131 Padua, Italy..
    Sferrazza, M.
    Univ Libre Bruxelles, Dept Phys, B-1050 Brussels, Belgium..
    Soderstrom, Pär-Anders
    Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Nuclear Physics.
    Stefanini, A. M.
    Ist Nazl Fis Nucl, Lab Nazl Legnaro, I-35020 Legnaro, Italy..
    Szilner, S.
    IN2P3, CNRS, CSNSM, Orsay Campus, F-91405 Orsay, France.;Univ Paris 11, Orsay Campus, F-91405 Orsay, France..
    Ur, C. A.
    Ist Nazl Fis Nucl, Sez Padova, I-35131 Padua, Italy.;Extreme Light Infrastruct Nucl Phys Facil, MG-6, Bucharest, Romania..
    Vogt, A.
    Univ Cologne, Inst Kernphys, D-50937 Cologne, Germany..
    Walshe, J.
    Univ Birmingham, Sch Phys & Astron, Birmingham B15 2TT, W Midlands, England..
    In-beam gamma-ray spectroscopy of the neutron-rich platinum isotope Pt-200 toward the N=126 shell gap2017In: Physical Review C: Covering Nuclear Physics, ISSN 2469-9985, E-ISSN 2469-9993, Vol. 95, no 6, article id 064321Article in journal (Refereed)
    Abstract [en]

    The neutron-rich nucleus Pt-200 is investigated via in-beam gamma-ray spectroscopy to study the shape evolution in the neutron-rich platinum isotopes towards the N = 126 shell closure. The two-neutron transfer reaction Pt-198(Se-82, Se-80)Pt-200 is used to populate excited states of Pt-200. The Advanced Gamma Ray Tracking Array (AGATA) demonstrator coupled with the PRISMA spectrometer detects gamma rays coincident with the Se-80 recoils, the binary partner of Pt-200. The binary partner method is applied to extract the gamma-ray transitions and build the level scheme of Pt-200. The level at 1884 keV reported by Yates et al. [S. W. Yates, E. M. Baum, E. A. Henry, L. G. Mann, N. Roy, A. Aprahamian, R. A. Meyer, and R. Estep, Phys. Rev. C 37, 1889 (1988)] was confirmed to be at 1882.1 keV and assigned as the (6(1)(+)) state. An additional gamma ray was found and it presumably deexcites the (8(1)(+)) state. The results are compared with state-of-the-art beyond mean-field calculations, performed for the even-even Pt190-204 isotopes, revealing that Pt-200 marks the transition from the gamma-unstable behavior of lighter Pt nuclei towards a more spherical one when approaching the N = 126 shell closure.

  • 47. Kobyakov, D. N.
    et al.
    Pethick, C. J.
    KTH, Centres, Nordic Institute for Theoretical Physics NORDITA.
    Reddy, S.
    Schwenk, A.
    Dispersion and decay of collective modes in neutron star cores2017In: Physical Review C: Covering Nuclear Physics, ISSN 2469-9985, E-ISSN 2469-9993, Vol. 96, no 2, article id 025805Article in journal (Refereed)
    Abstract [en]

    We calculate the frequencies of collective modes of neutrons, protons, and electrons in the outer core of neutron stars. The neutrons and protons are treated in a hydrodynamic approximation and the electrons are regarded as collisionless. The coupling of the nucleons to the electrons leads to Landau damping of the collective modes and to significant dispersion of the low-lying modes. We investigate the sensitivity of the mode frequencies to the strength of entrainment between neutrons and protons, which is not well characterized. The contribution of collective modes to the thermal conductivity is evaluated.

  • 48. Kobyakov, D. N.
    et al.
    Pethick, Christopher J.
    Stockholm University, Nordic Institute for Theoretical Physics (Nordita). University of Copenhagen, Denmark.
    Reddy, S.
    Schwenk, A.
    Dispersion and decay of collective modes in neutron star cores2017In: Physical Review C: Covering Nuclear Physics, ISSN 2469-9985, E-ISSN 2469-9993, Vol. 96, no 2, article id 025805Article in journal (Refereed)
    Abstract [en]

    We calculate the frequencies of collective modes of neutrons, protons, and electrons in the outer core of neutron stars. The neutrons and protons are treated in a hydrodynamic approximation and the electrons are regarded as collisionless. The coupling of the nucleons to the electrons leads to Landau damping of the collective modes and to significant dispersion of the low-lying modes. We investigate the sensitivity of the mode frequencies to the strength of entrainment between neutrons and protons, which is not well characterized. The contribution of collective modes to the thermal conductivity is evaluated.

  • 49.
    Lewis, M. C.
    et al.
    Univ Liverpool, Dept Phys, Oliver Lodge Lab, Liverpool L69 7ZE, Merseyside, England..
    Parr, E.
    Univ Liverpool, Dept Phys, Oliver Lodge Lab, Liverpool L69 7ZE, Merseyside, England..
    Page, R. D.
    Univ Liverpool, Dept Phys, Oliver Lodge Lab, Liverpool L69 7ZE, Merseyside, England..
    McPeake, C.
    Univ Liverpool, Dept Phys, Oliver Lodge Lab, Liverpool L69 7ZE, Merseyside, England..
    Joss, D. T.
    Univ Liverpool, Dept Phys, Oliver Lodge Lab, Liverpool L69 7ZE, Merseyside, England..
    Ali, F. A.
    Univ Liverpool, Dept Phys, Oliver Lodge Lab, Liverpool L69 7ZE, Merseyside, England.;Univ Sulaimani, Coll Educ, Dept Phys, POB 334, Sulaimani, Kurdistan Regio, Iraq.;Univ Guelph, Dept Phys, Guelph, ON N1G 2W1, Canada..
    Auranen, K.
    Univ Jyvaskyla, Dept Phys, FI-40014 Jyvaskyla, Finland.;Argonne Natl Lab, 9700 S Cass Ave, Argonne, IL 60439 USA..
    Briscoe, A. D.
    Univ Liverpool, Dept Phys, Oliver Lodge Lab, Liverpool L69 7ZE, Merseyside, England..
    Capponi, L.
    Univ West Scotland, Sch Engn & Comp, Paisley PA1 2BE, Renfrew, Scotland..
    Grahn, T.
    Univ Jyvaskyla, Dept Phys, FI-40014 Jyvaskyla, Finland..
    Greenlees, P. T.
    Univ Jyvaskyla, Dept Phys, FI-40014 Jyvaskyla, Finland..
    Henderson, J.
    Univ York, Dept Phys, York YO10 5DD, N Yorkshire, England.;Lawrence Livermore Natl Lab, 7000 East Ave, Livermore, CA 94550 USA..
    Herzan, A.
    Univ Liverpool, Dept Phys, Oliver Lodge Lab, Liverpool L69 7ZE, Merseyside, England.;Slovak Acad Sci, Inst Phys, SK-84511 Bratislava, Slovakia..
    Jakobsson, U.
    Univ Jyvaskyla, Dept Phys, FI-40014 Jyvaskyla, Finland.
    Julin, R.
    Univ Jyvaskyla, Dept Phys, FI-40014 Jyvaskyla, Finland..
    Juutinen, S.
    Univ Jyvaskyla, Dept Phys, FI-40014 Jyvaskyla, Finland..
    Konki, J.
    Univ Jyvaskyla, Dept Phys, FI-40014 Jyvaskyla, Finland.;CERN, CH-1211 Geneva 23, Switzerland..
    Labiche, M.
    STFC Daresbury Lab, Warrington WA4 4AD, Cheshire, England..
    Leino, M.
    Univ Jyvaskyla, Dept Phys, FI-40014 Jyvaskyla, Finland..
    Mason, P. J. R.
    STFC Daresbury Lab, Warrington WA4 4AD, Cheshire, England..
    Nyman, M.
    Univ Jyvaskyla, Dept Phys, FI-40014 Jyvaskyla, Finland.;IRMM, Retieseweg 111, B-2440 Geel, Belgium..
    O'Donnell, D.
    Univ West Scotland, Sch Engn & Comp, Paisley PA1 2BE, Renfrew, Scotland..
    Pakarinen, J.
    Univ Jyvaskyla, Dept Phys, FI-40014 Jyvaskyla, Finland..
    Papadakis, P.
    Univ Liverpool, Dept Phys, Oliver Lodge Lab, Liverpool L69 7ZE, Merseyside, England.;Univ Jyvaskyla, Dept Phys, FI-40014 Jyvaskyla, Finland..
    Partanen, J.
    Univ Jyvaskyla, Dept Phys, FI-40014 Jyvaskyla, Finland..
    Peura, P.
    Univ Jyvaskyla, Dept Phys, FI-40014 Jyvaskyla, Finland.;Univ Helsinki, Helsinki Inst Phys, FI-00014 Helsinki, Finland..
    Rahkila, P.
    Univ Jyvaskyla, Dept Phys, FI-40014 Jyvaskyla, Finland..
    Revill, J. P.
    Univ Liverpool, Dept Phys, Oliver Lodge Lab, Liverpool L69 7ZE, Merseyside, England..
    Ruotsalainen, P.
    Univ Jyvaskyla, Dept Phys, FI-40014 Jyvaskyla, Finland..
    Sandzelius, M.
    Univ Jyvaskyla, Dept Phys, FI-40014 Jyvaskyla, Finland..
    Saren, J.
    Univ Jyvaskyla, Dept Phys, FI-40014 Jyvaskyla, Finland..
    Saygi, B.
    Univ Liverpool, Dept Phys, Oliver Lodge Lab, Liverpool L69 7ZE, Merseyside, England.;Ege Univ, Fen Fak, Fizik Bolumu, TR-35100 Izmir, Turkey..
    Scholey, C.
    Univ Jyvaskyla, Dept Phys, FI-40014 Jyvaskyla, Finland..
    Simpson, J.
    STFC Daresbury Lab, Warrington WA4 4AD, Cheshire, England..
    Smith, J. F.
    Univ West Scotland, Sch Engn & Comp, Paisley PA1 2BE, Renfrew, Scotland..
    Smolen, M.
    Univ West Scotland, Sch Engn & Comp, Paisley PA1 2BE, Renfrew, Scotland..
    Sorri, J.
    Univ Jyvaskyla, Dept Phys, FI-40014 Jyvaskyla, Finland..
    Stolze, S.
    Univ Jyvaskyla, Dept Phys, FI-40014 Jyvaskyla, Finland.;Argonne Natl Lab, 9700 S Cass Ave, Argonne, IL 60439 USA..
    Thornthwaite, A.
    Univ Liverpool, Dept Phys, Oliver Lodge Lab, Liverpool L69 7ZE, Merseyside, England..
    Uusitalo, J.
    Univ Jyvaskyla, Dept Phys, FI-40014 Jyvaskyla, Finland..
    Decay of a 19(-) isomeric state in Lu-1562018In: Physical Review C: Covering Nuclear Physics, ISSN 2469-9985, E-ISSN 2469-9993, Vol. 98, no 2, article id 024302Article in journal (Refereed)
    Abstract [en]

    A multiparticle spin-trap isomeric state having a half-life of 179(4) ns and lying 2601 keV above the yrast 10(+) state in Lu-156 has been discovered. The Lu-156 nuclei were produced by bombarding isotopically enriched Cd-106 targets with beams of Ni-58 ions, separated in flight using the gas-filled separator RITU and their decays were measured using the GREAT spectrometer. Analysis of the main decay path that populates yrast states observed previously suggests a spin-parity assignment of 19(-) for the isomeric state, which is consistent with isomeric states identified in the N = 85 isotones. Comparison with other decay paths in Lu-156 indicates that the [pi h(11/)(2)(-1) circle times nu h(9/2)]10(+) state at the bottom of the yrast sequence is likely to be the a-decaying isomeric state, with the [pi h(11/)(2)(-1) circle times nu f(7/2)]9(+) state lying 62 keV above it. The relative ordering of the lowest-lying 9(+) and 10(+) states is inverted in Lu-156 compared with its odd-odd isotones.

  • 50.
    Litzinger, J.
    et al.
    Univ Cologne, Inst Kernphys, D-50937 Cologne, Germany..
    Blazhev, A.
    Univ Cologne, Inst Kernphys, D-50937 Cologne, Germany..
    Dewald, A.
    Univ Cologne, Inst Kernphys, D-50937 Cologne, Germany..
    Didierjean, F.
    Univ Strasbourg, CNRS, IPHC UMR 7178, F-67000 Strasbourg, France..
    Duchene, G.
    Univ Strasbourg, CNRS, IPHC UMR 7178, F-67000 Strasbourg, France..
    Fransen, C.
    Univ Cologne, Inst Kernphys, D-50937 Cologne, Germany..
    Lozeva, R.
    Univ Paris Saclay, CSNSM, CNRS IN2P3, Orsay Campus, FR-91405 Orsay, France..
    Verney, D.
    CNRS IN2P3, Inst Phys Nucl, F-91405 Orsay, France.;Univ Paris 11, F-91405 Orsay, France..
    de Angelis, G.
    Ist Nazl Fis Nucl, Lab Nazl Legnaro, I-35020 Legnaro, Italy..
    Bazzacco, D.
    Ist Nazl Fis Nucl, Sez Padova, I-35131 Padua, Italy.;Univ Padua, I-35131 Padua, Italy..
    Birkenbach, B.
    Univ Cologne, Inst Kernphys, D-50937 Cologne, Germany..
    Bottoni, S.
    Univ Milan, Dipartimento Fis, I-20133 Milan, Italy.;Ist Nazl Fis Nucl, Sez Milano, Via Celoria 16, I-20133 Milan, Italy..
    Bracco, A.
    Univ Milan, Dipartimento Fis, I-20133 Milan, Italy.;Ist Nazl Fis Nucl, Sez Milano, Via Celoria 16, I-20133 Milan, Italy..
    Braunroth, T.
    Univ Cologne, Inst Kernphys, D-50937 Cologne, Germany..
    Cederwall, Bo
    KTH, School of Engineering Sciences (SCI), Physics.
    Corradi, L.
    Ist Nazl Fis Nucl, Lab Nazl Legnaro, I-35020 Legnaro, Italy..
    Crespi, F. C. L.
    Univ Milan, Dipartimento Fis, I-20133 Milan, Italy.;Ist Nazl Fis Nucl, Sez Milano, Via Celoria 16, I-20133 Milan, Italy..
    Desesquelles, P.
    Ctr Spectrometrie Nucl & Spectrometrie Masse CSNS, CNRS IN2P3, Orsay Campus, F-91405 Orsay, France.;Univ Paris 11, Orsay Campus, F-91405 Orsay, France..
    Eberth, J.
    Univ Cologne, Inst Kernphys, D-50937 Cologne, Germany..
    Ellinger, E.
    Univ Cologne, Inst Kernphys, D-50937 Cologne, Germany..
    Farnea, E.
    Ist Nazl Fis Nucl, Sez Padova, I-35131 Padua, Italy.;Univ Padua, I-35131 Padua, Italy..
    Fioretto, E.
    Ist Nazl Fis Nucl, Lab Nazl Legnaro, I-35020 Legnaro, Italy..
    Gernhaeuser, R.
    Tech Univ Munich, Phys Dept E12, D-85748 Garching, Germany..
    Goasduff, A.
    Ist Nazl Fis Nucl, Lab Nazl Legnaro, I-35020 Legnaro, Italy..
    Gorgen, A.
    Ctr CEA Saclay, Inst Rech Fondamentales Univers IRFU, CEA DSM, F-91191 Gif Sur Yvette, France.;Univ Oslo, Dept Phys, POB 1048 Blindern, N-0316 Oslo, Norway..
    Gottardo, A.
    Ist Nazl Fis Nucl, Lab Nazl Legnaro, I-35020 Legnaro, Italy..
    Grebosz, J.
    Polish Acad Sci, Henry Niewodniczatiski Inst Nucl Phys, Ul Radzikowskiego 152, PL-31342 Krakow, Poland..
    Hackstein, M.
    Univ Cologne, Inst Kernphys, D-50937 Cologne, Germany..
    Hess, H.
    Univ Cologne, Inst Kernphys, D-50937 Cologne, Germany..
    Ibrahim, F.
    CNRS IN2P3, Inst Phys Nucl, F-91405 Orsay, France.;Univ Paris 11, F-91405 Orsay, France..
    Jolie, J.
    Univ Cologne, Inst Kernphys, D-50937 Cologne, Germany..
    Jungclaus, A.
    CSIC, Inst Estruct Mat, Serrano 119, E-28006 Madrid, Spain..
    Kolos, K.
    CNRS IN2P3, Inst Phys Nucl, F-91405 Orsay, France.;Univ Paris 11, F-91405 Orsay, France..
    Korten, W.
    Ctr CEA Saclay, Inst Rech Fondamentales Univers IRFU, CEA DSM, F-91191 Gif Sur Yvette, France..
    Leoni, S.
    Univ Milan, Dipartimento Fis, I-20133 Milan, Italy.;Ist Nazl Fis Nucl, Sez Milano, Via Celoria 16, I-20133 Milan, Italy..
    Lunardi, S.
    Ist Nazl Fis Nucl, Sez Padova, I-35131 Padua, Italy.;Univ Padua, I-35131 Padua, Italy..
    Maj, A.
    Menegazzo, R.
    Ist Nazl Fis Nucl, Sez Padova, I-35131 Padua, Italy..
    Mengoni, D.
    Ist Nazl Fis Nucl, Sez Padova, I-35131 Padua, Italy.;Univ Padua, I-35131 Padua, Italy.;Univ West Scotland, Nucl Phys Res Grp, High St, Paisley PA1 2BE, Renfrew, Scotland..
    Michelagnoli, C.
    Ist Nazl Fis Nucl, Sez Padova, I-35131 Padua, Italy.;GANIL, CEA DSM CNRS IN2P3, BP 55027, F-14076 Caen 5, France..
    Mijatovic, T.
    Ruder Bakovie Inst, HR-10002 Zagreb, Croatia..
    Million, B.
    Ist Nazl Fis Nucl, Sez Milano, I-20133 Milan, Italy..
    Moeller, O.
    Tech Univ Darmstadt, Inst Kernphys, D-64289 Darmstadt, Germany..
    Modamio, V.
    Ist Nazl Fis Nucl, Lab Nazl Legnaro, I-35020 Legnaro, Italy..
    Montagnoli, G.
    Ist Nazl Fis Nucl, Sez Padova, I-35131 Padua, Italy.;Univ Padua, I-35131 Padua, Italy..
    Montanari, D.
    Ist Nazl Fis Nucl, Sez Padova, I-35131 Padua, Italy.;Univ Padua, I-35131 Padua, Italy..
    Morales, A. I.
    Univ Milan, Dipartimento Fis, I-20133 Milan, Italy.;Ist Nazl Fis Nucl, Sez Milano, Via Celoria 16, I-20133 Milan, Italy..
    Napoli, D. R.
    Ist Nazl Fis Nucl, Lab Nazl Legnaro, I-35020 Legnaro, Italy..
    Niikura, M.
    CNRS IN2P3, Inst Phys Nucl, F-91405 Orsay, France.;Univ Paris 11, F-91405 Orsay, France..
    Pietralla, N.
    Tech Univ Darmstadt, Inst Kernphys, D-64289 Darmstadt, Germany..
    Pollarolo, G.
    Univ Turin, Dipartimento Fis Teor, I-10125 Turin, Italy.;Ist Nazl Fis Nucl, I-10125 Turin, Italy..
    Pullia, A.
    Univ Milan, Dipartimento Fis, I-20133 Milan, Italy.;Ist Nazl Fis Nucl, Sez Milano, Via Celoria 16, I-20133 Milan, Italy..
    Quintana, B.
    Univ Salamanca, Lab Radiaciones Ionizantes, E-37008 Salamanca, Spain..
    Recchia, F.
    Ist Nazl Fis Nucl, Sez Padova, I-35131 Padua, Italy.;Univ Padua, I-35131 Padua, Italy..
    Reiter, P.
    Univ Cologne, Inst Kernphys, D-50937 Cologne, Germany..
    Rosso, D.
    Ist Nazl Fis Nucl, Lab Nazl Legnaro, I-35020 Legnaro, Italy..
    Sahin, E.
    Ist Nazl Fis Nucl, Lab Nazl Legnaro, I-35020 Legnaro, Italy..
    Salsac, M. D.
    Ctr CEA Saclay, Inst Rech Fondamentales Univers IRFU, CEA DSM, F-91191 Gif Sur Yvette, France..
    Scarlassara, F.
    Ist Nazl Fis Nucl, Sez Padova, I-35131 Padua, Italy.;Univ Padua, I-35131 Padua, Italy..
    Soderstroem, P. -A
    Stefanini, A. M.
    Ist Nazl Fis Nucl, Lab Nazl Legnaro, I-35020 Legnaro, Italy..
    Stezowski, O.
    Univ Lyon, Univ Lyon 1, IN2P3 CNRS, F-69622 Villeurbanne, France..
    Szilner, S.
    Ruder Bakovie Inst, HR-10002 Zagreb, Croatia..
    Theisen, Ch.
    Ctr CEA Saclay, Inst Rech Fondamentales Univers IRFU, CEA DSM, F-91191 Gif Sur Yvette, France..
    Valiente-Dobon, J. J.
    Ist Nazl Fis Nucl, Lab Nazl Legnaro, I-35020 Legnaro, Italy..
    Vandone, V.
    Univ Milan, Dipartimento Fis, I-20133 Milan, Italy.;Ist Nazl Fis Nucl, Sez Milano, Via Celoria 16, I-20133 Milan, Italy..
    Vogt, A.
    Univ Cologne, Inst Kernphys, D-50937 Cologne, Germany..
    Transition probabilities in neutron-rich Se-80,Se-82 and the role of the nu g(9/2) orbital2018In: Physical Review C: Covering Nuclear Physics, ISSN 2469-9985, E-ISSN 2469-9993, Vol. 97, no 4, article id 044323Article in journal (Refereed)
    Abstract [en]

    Transition probabilities of intermediate-spin yrast and non-yrast excitations in Se-80,Se-82 were investigated in a recoil distance Doppler-shift (RDDS) experiment performed at the Istituto Nazionale di Fisica Nucleare, Laboratori Nazionali di Legnaro. The Cologne Plunger device for deep inelastic scattering was used for the RDDS technique and was combined with the AGATA Demonstrator array for the gamma-ray detection and coupled to the PRISMA magnetic spectrometer for an event-by-event particle identification. In Se-80, the level lifetimes of the yrast (6(1)(+)) and (8(1)(+)) states and of a non-yrast band feeding the yrast 4(1)(+) state are determined. A spin and parity assignment of the head of this sideband is discussed based on the experimental results and supported by large-scale shell-model calculations. In Se-82, the level lifetimes of the yrast 6(1)(+) state and the yrare 4(2)(+) state and lifetime limits of the yrast (10(1)(+)) state and of the 5(1)(-) state are determined. Although the experimental results contain large uncertainties, they are interpreted with care in terms of large-scale shell-model calculations using the effective interactions JUN45 and jj44b. The excited states' wave functions are investigated and discussed with respect to the role of the neutron g(9/2) orbital.

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