Evaluations and calculations of neutron reactions on 238U up to 20 MeV

In order to improve the quality of neutron data for 238 U in CENDL, considering the impact of new measurements, a brand-new evaluation of the complete set of neutron induced 238 U reaction data up to 20 MeV has been performed. Important reactions, such as (n,tot), (n,γ), (n,f), (n,2n) and (n,3n) reaction cross sections and average number of fission neutrons have been evaluated based on experimental data analysis. Also, using existing optical model potential parameters, new theoretical calculations based on Hauser-Feshbach and pre-equilibrium model have been carried out. Resonance parameters and prompt fission neutron spectrum from ENDF/B-VIII.0 have been adopted. Guided by integral benchmark, (n,inl), (n,γ) and (n,f) reaction cross sections have undergone multiple adjustments, leading to a noticeable improvement in data quality, as indicated by final benchmark results.

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Publication Details

Journal
Nuclear Engineering and Technology
Published
2024-08-30
DOI
https://doi.org/10.1016/j.net.2024.08.059
Citations
1
Primary Topic
Nuclear reactor physics and engineering
Type
article
Field-Weighted Citation Impact
1.30

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Evaluations and calculations of neutron reactions on 238U up to 20 MeV

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Evaluations and calculations of neutron reactions on 238U up to 20 MeV

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article en
1 citations

Abstract

In order to improve the quality of neutron data for 238 U in CENDL, considering the impact of new measurements, a brand-new evaluation of the complete set of neutron induced 238 U reaction data up to 20 MeV has been performed. Important reactions, such as (n,tot), (n,γ), (n,f), (n,2n) and (n,3n) reaction cross sections and average number of fission neutrons have been evaluated based on experimental data analysis. Also, using existing optical model potential parameters, new theoretical calculations based on Hauser-Feshbach and pre-equilibrium model have been carried out. Resonance parameters and prompt fission neutron spectrum from ENDF/B-VIII.0 have been adopted. Guided by integral benchmark, (n,inl), (n,γ) and (n,f) reaction cross sections have undergone multiple adjustments, leading to a noticeable improvement in data quality, as indicated by final benchmark results.

Nuclear Engineering and TechnologyVol. 57(2)
China Institute of Atomic Energy (CN)
Ministry of Science and Technology of the People's Republic of China, International Atomic Energy Agency, Ministry of Finance
Openalex Percentile: Top 13%
Nuclear reactor physics and engineering
1.30
DOIOpen Access PDFOpenAlex
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