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Measurement of the 6Li(n,α) neutron standard cross-section at the GELINA facility
Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Applied Nuclear Physics.ORCID iD: 0000-0002-1705-4086
Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Applied Nuclear Physics.
European Spallat Source, Box 176, S-22100 Lund, Sweden.
Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Applied Nuclear Physics.
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2016 (English)In: The European Physical Journal Conferences, ISSN 2101-6275, E-ISSN 2100-014X, Vol. 122Article in journal, Meeting abstract (Refereed) Published
Abstract [en]

The Li-6(n,alpha) reaction cross-section is commonly used as a reference cross section. However, it is only considered a neutron standard up to 1 MeV. For higher energies, there are discrepancies of several per cents between recent measurements and evaluated data files. In order to extend and establish Li-6 (n,alpha) as a neutron standard above 1 MeV these discrepancies must be resolved. Our measurement at the GELINA facility at JRC-IRMM in Geel, Belgium is ongoing. We are using a double twin Frisch-grid setup to detect both a-particles from two Li-6 targets and fission products from two U-235 reference targets. Our targets have thick backings but are employed in pairs, one forward facing and one backward facing. In this way we still cover, in principle, a solid angle of 4 pi. We present some preliminary results showing that the existing cross-section data is well reproduced around the resonance at 240 keV. The final data taking will start in the beginning of 2016, when the GELINA facility goes online again after a few months of shut down.

Place, publisher, year, edition, pages
2016. Vol. 122
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Subatomic Physics
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URN: urn:nbn:se:uu:diva-313909DOI: 10.1051/epjconf/201612208006ISI: 000389877200041OAI: oai:DiVA.org:uu-313909DiVA, id: diva2:1068463
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CNR*15
Available from: 2017-01-25 Created: 2017-01-25 Last updated: 2018-04-04Bibliographically approved

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Jansson, KajAl-Adili, AliGustavsson, CeciliaPomp, Stephan
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