Speaker
Description
New evaluations of neutron-induced nuclear reactions on $^{54,56,57,58}$Fe through the CIELO [1] international collaboration were adopted by the ENDF/B-VIII.0 [2] library, released in 2018. These evaluations were performed by adjusting model inputs to reproduce available experimental data above neutron resonance regions. Since the latest release, two new experimental data sets are available; one is inelastic scattering cross sections performed at the Geel Electron LINear Accelerator facility (GELINA) [3] and the other is neutron-induced charged particle reaction cross sections, such as (n,p), (n,np), (n,d), and (,$\alpha$), performed using the LENZ (Low Energy Neutron-induce Charged-particle (Z) Chamber) instrument at Los Alasmos Neutron Science Center (LANSCE) up to 30 MeV [4]. With these additional data above 10 MeV, we observed the discrepancy between experimental cross sections and the current ENDF/B-VIII.0 evaluation on $^{54}$Fe. In this work, we present the investigation of input parameters for the Hauser-Feshbach model, in order to better reproduce experimental cross-section data of neutron-induced charged particle reactions and inelastic scattering on $^{54}$Fe.
This work benefits from the LANSCE accelerator facility and is supported by the U.S. Department of Energy under contract No. 89233218CNA000001, by the US-ROK International Nuclear Energy Research Initiative (I-NERI) program of Department of Energy, Office of Nuclear Energy and the National Research Foundation of Korea under contract No. NRF-2020M2A8A1000930, and by the US Nuclear Data Program under the Office of Science of the U.S. Department of Energy.
[1] M. Chadwick, et al., Nucl. Data Sheets 118, 1 (2014)
[2] D. Brown, et al., Nucl. Data Sheets 148, 1 (2018)
[3] A. Olacel, et al., Eur. Phys. Jour. A 54, 183 (2018)
[4] A. Georgiadou et al. under review (2021)
LA-UR-21-29638