Strong gamma-ray emission from neutron unbound states populated in beta-decay: Impact on (n,gamma) cross-section estimates


Tain J. L., Guadilla V., Valencia E., Algora A., Zakari-Issoufou A. -., Rice S., ...More

International Conference on Nuclear Data for Science and Technology (ND), Bruges, Belgium, 11 - 16 September 2016, vol.146 identifier identifier

  • Publication Type: Conference Paper / Full Text
  • Volume: 146
  • Doi Number: 10.1051/epjconf/201714601002
  • City: Bruges
  • Country: Belgium
  • Istanbul University Affiliated: Yes

Abstract

Total absorption gamma-ray spectroscopy is used to measure accurately the intensity of gamma emission from neutron-unbound states populated in the beta-decay of delayed-neutron emitters. From the comparison of this intensity with the intensity of neutron emission one can deduce information on the (n,gamma) cross section for unstable neutron-rich nuclei of interest in r process abundance calculations. A surprisingly large gamma branching was observed for a number of isotopes. The results are compared with Hauser-Feshbach calculations and discussed.