评估铀-233 在 keV 区域的中子俘获截面

IF 1.9 3区工程技术 Q1 NUCLEAR SCIENCE & TECHNOLOGY Annals of Nuclear Energy Pub Date : 2024-11-27 DOI:10.1016/j.anucene.2024.110977

Naohiko Otuka , Kenichi Tada , Oscar Cabellos , Osamu Iwamoto

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引用次数: 0

摘要

利用最近在洛斯阿拉莫斯国家实验室 LANCE 设施测量并编入 EXFOR 数据库的阿尔法值，对 3 keV 至 1 MeV 之间的铀-233 中子俘获截面进行了评估。所获得的俘获截面系统性地低于主要通用核资料库的最新版本，而在 20 keV 附近，JENDL-5 资料库的降低幅度接近 50%。通过使用 JENDL-5 库进行蒙特卡洛中子输运计算，以从 ICSBEP 手册中选取的 166 个临界实验为基准，对新评估的截面进行了比对。

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Evaluation of uranium-233 neutron capture cross section in keV region

The uranium-233 neutron capture cross section between 3 keV and 1 MeV was evaluated with the alpha value recently measured at the Los Alamos National Laboratory LANCE facility and compiled in the EXFOR library. The obtained capture cross section is systematically lower than those in the latest versions of the major general purpose nuclear data libraries, and the reduction from the JENDL-5 library is close to 50% around 20 keV. The newly evaluated cross section was benchmarked against 166 criticality experiments chosen from the ICSBEP handbook by performing Monte Carlo neutron transport calculation with the JENDL-5 library, and slight reduction of the cumulative chi-square value was achieved by adoption of the newly evaluated capture cross section.

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来源期刊

Annals of Nuclear Energy 工程技术-核科学技术

CiteScore

4.30

自引率

21.10%

发文量

632

审稿时长

7.3 months

期刊介绍： Annals of Nuclear Energy provides an international medium for the communication of original research, ideas and developments in all areas of the field of nuclear energy science and technology. Its scope embraces nuclear fuel reserves, fuel cycles and cost, materials, processing, system and component technology (fission only), design and optimization, direct conversion of nuclear energy sources, environmental control, reactor physics, heat transfer and fluid dynamics, structural analysis, fuel management, future developments, nuclear fuel and safety, nuclear aerosol, neutron physics, computer technology (both software and hardware), risk assessment, radioactive waste disposal and reactor thermal hydraulics. Papers submitted to Annals need to demonstrate a clear link to nuclear power generation/nuclear engineering. Papers which deal with pure nuclear physics, pure health physics, imaging, or attenuation and shielding properties of concretes and various geological materials are not within the scope of the journal. Also, papers that deal with policy or economics are not within the scope of the journal.