EXFOR-based simultaneous evaluation for neutron-induced fission cross section of plutonium-242

EXFORに基づくプルトニウム242の中性子誘起核分裂断面積の同時評価

Okuyama, Riko*; Otsuka, Naohiko*; Chiba, Go*; Iwamoto, Osamu

The $^{242}$ Pu neutron-induced fission cross section was evaluated from 100 keV to 200 MeV. The experimental $^{242}$ Pu and $^{235}$ U fission cross sections and their ratios in the EXFOR library were reviewed and analysed by the least-squares method. Additional simultaneous evaluation was performed by including the experimental database of the $^{233,238}$ U and $^{239,240,241}$ Pu fission cross sections and their ratios developed for JENDL-5 evaluation. The evaluated $^{242}$ Pu fission cross section was verified against the cross section measured in the californium-252 spontaneous fission neutron field and criticalities of small-sized LANL fast systems. The newly evaluated fission cross section is systematically lower than the JENDL-4.0 cross section and demonstrates better performance.

発表言語	:	English
掲載資料名	:	Journal of Nuclear Science and Technology
巻	:	61
号	:	1
ページ数	:	p.57 - 67
発行年月	:	2024/01
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論文URL	:	https://doi.org/10.1080/00223131.2023.2267070
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InCites™	:	パーセンタイル：28.31 分野：Nuclear Science & Technology
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登録番号 : AA20230068
抄録集掲載番号 : 52001013
論文投稿番号 : 28428

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