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

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. Here, the results are compared with Hauser-Feshbach calculations and discussed.
Authors:
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  1. Instituto de Fisica Corpuscular, Paterna (Spain)
  2. Instituto de Fisica Corpuscular, Paterna (Spain); Institute of Nuclear Research of the Hungarian Academy of Sciences, Debrecen (Hungary)
  3. CNRS/IN2P3, Nantes (France)
  4. Univ. of Surrey, Guilford (United Kingdom)
  5. Univ. of Jyvaskyla (Finland)
  6. Petersburg Nuclear Physic Institute, Gatchina (Russia)
  7. Univ. Politecnica de Catalunya, Barcelona (Spain)
  8. Centro de Investigaciones Energeticas Medioambientales y Tecnologicas, Madrid (Spain)
  9. Univ. Complutense, Madrid (Spain)
  10. Istanbul Univ., Istanbul (Turkey)
  11. Argonne National Lab. (ANL), Argonne, IL (United States)
  12. Institut de Physique Nucleaire d'Orsay, Orsay (France)
  13. Instituto de Estructura de la Materia, Madrid (Spain)
  14. Univ. of Surrey, Guilford (United Kingdom); National Physical Lab., Middlesex (United Kingdom)
  15. Brookhaven National Lab. (BNL), Upton, NY (United States)
Publication Date:
Report Number(s):
BNL-114737-2017-JA
Journal ID: ISSN 2100-014X; 131546
Grant/Contract Number:
AC02-06CH11357; SC0012704
Type:
Accepted Manuscript
Journal Name:
EPJ Web of Conferences
Additional Journal Information:
Journal Volume: 146; Journal ID: ISSN 2100-014X
Publisher:
EDP Sciences
Research Org:
Argonne National Lab. (ANL), Argonne, IL (United States); Brookhaven National Laboratory (BNL), Upton, NY (United States)
Sponsoring Org:
USDOE Office of Science (SC), Nuclear Physics (NP) (SC-26); Spanish Ministerio de Economia y Competitividad (MINECO); European Commission, Community Research and Development Information Service (CORDIS), Seventh Framework Programme (FP7)
Country of Publication:
United States
Language:
English
Subject:
73 NUCLEAR PHYSICS AND RADIATION PHYSICS
OSTI Identifier:
1411146
Alternate Identifier(s):
OSTI ID: 1393946