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High-sensitivity study of levels in Al-30 following beta decay of Mg-30
Univ Complutense CEI Moncloa, Fac Fis, Grp Fis Nucl, E-28040 Madrid, Spain.;Univ Guelph, Dept Phys, Guelph, ON N1G 2W1, Canada..
Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy. Univ Complutense CEI Moncloa, Fac Fis, Grp Fis Nucl, E-28040 Madrid, Spain.;Natl Ctr Nucl Res, PL-04500 Otwock, Poland..
Univ Complutense CEI Moncloa, Fac Fis, Grp Fis Nucl, E-28040 Madrid, Spain..
Univ Complutense CEI Moncloa, Fac Fis, Grp Fis Nucl, E-28040 Madrid, Spain..
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2016 (English)In: PHYSICAL REVIEW C, ISSN 2469-9985, Vol. 94, no 5, article id 054318Article in journal (Refereed) Published
Abstract [en]

gamma-ray and fast-timing spectroscopy were used to study levels in Al-30 populated following the beta(-) decay of Mg-30. Five new transitions and three new levels were located in Al-30. A search was made to identify the third 1(+) state expected at an excitation energy of similar to 2.5 MeV. Two new levels were found, at 3163.9 and 3362.5 keV, that are firm candidates for this state. Using the advanced time-delayed (ATD) beta gamma gamma (t) method we have measured the lifetime of the 243.8-keV state to be T-1/2 = 15(4) ps, which implies that the 243.8-keV transition is mainly of M1 character. Its fast B(M1; 2(+) -> 3(+)) value of 0.10(3) W.u. is in very good agreement with the USD shell-model prediction of 0.090 W.u. The 1801.5-keV level is the only level observed in this study that could be a candidate for the second excited 2(+) state.

Place, publisher, year, edition, pages
2016. Vol. 94, no 5, article id 054318
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Physical Sciences
Identifiers
URN: urn:nbn:se:uu:diva-311189DOI: 10.1103/PhysRevC.94.054318ISI: 000388467600001OAI: oai:DiVA.org:uu-311189DiVA, id: diva2:1059238
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EU, European Research Council, 506065
Available from: 2016-12-22 Created: 2016-12-22 Last updated: 2016-12-22Bibliographically approved

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