论文标题
Jendl-5的中子诱发的铀和p裂横截面的同时基于外部的同时评估
EXFOR-based simultaneous evaluation of neutron-induced uranium and plutonium fission cross sections for JENDL-5
论文作者
论文摘要
同时对中子诱导的裂变截面进行了$^{233,235} $ u和$^{239,241} $ pu的$^{239,241} $ pu从10 keV到200 meV，以及$^{238} $ u和$ u和$^{240} $ pu frof 100 kev to 100 kev to 200 mev。通过将Schmittroth的屋顶函数与实验横截面的对数和EXFOR库中的横截面比对数达到最小二乘拟合进行评估。使用同时的评估代码SOK将其扩展到任意单位的数据。该代码的输出被用作评估的横截面，而无需进行任何进一步的校正。 The newly obtained evaluated cross sections were compared with the evaluated cross sections in the JENDL-4.0 library and the IAEA Neutron Data Standards 2017. The evaluated cross sections were also validated against the californium-252 spontaneous fission neutron spectrum averaged cross sections, $ΣΣ$ (coupled thermal/fast uranium and boron carbide spherical assembly) neutron spectrum averaged横截面和小型LANL快速系统的关键。 Jendl-4.0库中获得的评估横截面的更改在4％（$^{241} $ PU）之内，3％（$^{233} $ U，$^{240} $ PU）或2％（$^{$^{235} $ u，$^{239} $ PU）。新评估的$^{235} $ u，$^{238} $ u和$^{239} $ pu交叉部分与IAEA Neutron数据标准2017在2％之内与IAEA Neutron Data Standards一致，但一些例外。
The neutron-induced fission cross sections were simultaneously evaluated for the JENDL-5 library for $^{233,235}$U and $^{239,241}$Pu from 10 keV to 200 MeV and for $^{238}$U and $^{240}$Pu from 100 keV to 200 MeV. Evaluation was performed by least-squares fitting of Schmittroth's roof function to the logarithms of the experimental cross sections and cross section ratios in the EXFOR library. A simultaneous evaluation code SOK was used with its extension to data in arbitrary unit. The outputs of the code were adopted as the evaluated cross sections without any further corrections. The newly obtained evaluated cross sections were compared with the evaluated cross sections in the JENDL-4.0 library and the IAEA Neutron Data Standards 2017. The evaluated cross sections were also validated against the californium-252 spontaneous fission neutron spectrum averaged cross sections, $ΣΣ$ (coupled thermal/fast uranium and boron carbide spherical assembly) neutron spectrum averaged cross sections, and small-sized LANL fast system criticalities. The changes in the obtained evaluated cross sections from those in the JENDL-4.0 library are within 4% ($^{241}$Pu), 3% ($^{233}$U, $^{240}$Pu), or 2% ($^{235}$U, $^{239}$Pu). The newly evaluated $^{235}$U, $^{238}$U and $^{239}$Pu cross sections agree with the IAEA Neutron Data Standards 2017 within 2% with some exceptions.
