63Cu(n,gamma) cross section measured via 25 keV activation and time of flight

Research output: Contribution to journalArticle

Authors

  • M Weigand
  • C Beinrucker
  • A Couture
  • A Fiebiger
  • M Fonseca
  • K Gobel
  • M Heftrich
  • T Heftrich
  • M Jandel
  • Franz Kappeler
  • Antonin Krása
  • Claudia Lederer
  • H. Y. Lee
  • R Plag
  • Arjan Plompen
  • Rene Reifarth
  • S Schmidt
  • K Sonnabend
  • J.L. Ullmann

Institutes & Expert groups

  • Goethe Universität Frankfurt am Main - Institut für Angewandte Physik
  • LANL - Los Alamos National Laboratory
  • LIBPhys-UNL - Universidade Nova de Lisboa - DF, FCT
  • IKET KIT INE - Karlsruhe Institute of : Institute for Nuclear Waste Disposal
  • EC - JRC - European Commission - Joint Research Centre

Documents & links

Abstract

In the nuclear mass range A ≈ 60 to 90 of the solar abundance distribution the weak s-process component is the dominant contributor. In this scenario, which is related to massive stars, the overall neutron exposure is not sufficient for the s process to reach mass flow equilibrium. Hence, abundances and isotopic ratios are very sensitive to the neutron capture cross sections of single isotopes, and nucleosynthesis models need accurate experimental data. In this work we report on a new measurement of the 63Cu(n,γ ) cross section for which the existing experimental data show large discrepancies. The 63Cu(n,γ ) cross section at kBT = 25 keV was determined via activation with a quasistellar neutron spectrum at the Joint Research Centre (JRC) in Geel, and the energy dependence was determined with the time-of-flight technique and the calorimetric 4π BaF2 detector array DANCE at the Los Alamos National Laboratory.We provide new cross section data for the whole astrophysically relevant energy range.

Details

Original languageEnglish
Article number015808
Number of pages9
JournalPhysical Review C
Volume95
Publication statusPublished - 31 Jan 2017

Keywords

  • cross section measurement, activation, time of flight, copper, neutron capture

ID: 4756061