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Direct measurement of 59Ni(n, p) 59Co and 59Ni(n, α) 56Fe at fast-neutron energies from 500 keV to 10 MeV

Journal Article · · Physical Review. C
 [1];  [1];  [1];  [1];  [1];  [1];  [1];  [1];  [1];  [1];  [1];  [1];  [1];  [2];  [2];  [3]
  1. Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
  2. Central Michigan Univ., Mount Pleasant, MI (United States)
  3. Korean Atomic Energy Reseach Institute, Daejeon (Korea, Republic of)
+ Show Author Affiliations
We report nuclear reaction data for neutron induced reactions on unstable nuclei are critical for a wide range of applications spanning studies of nuclear astrophysics, nuclear reactor designs, and radiochemistry diagnostics. However, nuclear data evaluations of the reaction cross sections are largely based on calculations due to the difficulty in performing this class of measurements and the resulting lack of experimental data. For neutron induced charged particle reactions at fast neutron energies, at the MeV scale, these cross section predictions are predominately driven by statistical Hauser-Feshbach calculations. In this work, we present partial and total 59Ni(n, p) and 59Ni(n, α) cross sections, measured directly with a radioactive 59Ni target, and compare the results to the present nuclear data evaluations. In addition, the results from this work are compared to a recent study of the 59Ni(n, xp) reaction cross section that was performed via an indirect surrogate ratio method. The expected energy trend of the cross section, based on the current work, is inconsistent with that of the surrogate work. This calls into question the reliability of that application of the surrogate ratio method and highlights the need for direct measurements on unstable nuclei, when feasible.
Research Organization:
Los Alamos National Laboratory (LANL), Los Alamos, NM (United States)
Sponsoring Organization:
Korean Atomic Energy Research Institute (KAERI); USDOE Laboratory Directed Research and Development (LDRD) Program; USDOE National Nuclear Security Administration (NNSA)
Grant/Contract Number:
89233218CNA000001
OSTI ID:
1866958
Report Number(s):
LA-UR-21-25101
Journal Information:
Physical Review. C, Journal Name: Physical Review. C Journal Issue: 4 Vol. 105; ISSN 2469-9985
Publisher:
American Physical Society (APS)Copyright Statement
Country of Publication:
United States
Language:
English

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Related Subjects

73 NUCLEAR PHYSICS AND RADIATION PHYSICS
methods for nuclear reactions
models
neutron physics
nuclear reactions
nucleon induced nuclear reactions