https://doi.org/10.1051/epjconf/201714601002
Strong γ-ray emission from neutron unbound states populated in β-decay: Impact on (n,γ) cross-section estimates
1 Instituto de Fisica Corpuscular, CSIC - Univ. Valencia, 46980 Paterna, Spain
2 Subatech, CNRS/IN2P3, 44307 Nantes, France
3 University of Surrey, Department of Physics, Guilford GU2 7XH, UK
4 University of Jyvaskyla, Department of Physics, PO Box 35, 40014 University of Jyvaskyla, Finland
5 Centro de Investigaciones Energéticas Medioambientales y Tecnólogicas, 28040 Madrid, Spain
6 Universitat Politecnica de Catalunya, 08028 Barcelona, Spain
7 Nuclear Engineering Division, Argonne National Laboratory, Argonne, Illinois 60439, USA
8 NNDC, Brookhaven National Laboratory, Upton, New York 11973, USA
9 Petersburg Nuclear Physics Institute, 188300 Gatchina, Russia
10 Universidad Complutense, Grupo de Física Nuclear, CEI Moncloa, 28040 Madrid, Spain
11 Department of Physics, Istanbul University, 34134 Istanbul, Turkey
12 Institut de Physique Nuclèaire d'Orsay, 91406 Orsay, France
13 Instituto de Estructura de la Materia, CSIC, 28006 Madrid, Spain
14 Institute of Nuclear Research of the Hungarian Academy of Sciences, 4026 Debrecen, Hungary
15 National Physical Laboratory, Teddington, Middlesex, TW11 0LW, UK
a e-mail: tain@ific.uv.es
Published online: 13 September 2017
Total absorption gamma-ray spectroscopy is used to measure accurately the intensity of γ emission from neutron-unbound states populated in the β-decay of delayed-neutron emitters. From the comparison of this intensity with the intensity of neutron emission one can deduce information on the (n,γ) cross section for unstable neutron-rich nuclei of interest in r process abundance calculations. A surprisingly large γ branching was observed for a number of isotopes. The results are compared with Hauser-Feshbach calculations and discussed.
© The Authors, published by EDP Sciences, 2017
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