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根据209Bi与中子反应的总截面、弹性散射截面、去弹性散射截面和弹性散射角分布的实验数据,应用自动调整光学模型势参数程序,得到了一组中子的光学模型势参数;使用这组参数和中子能量在20 MeV以下的核反应理论计算程序并考虑了中子直接非弹性散射的贡献,计算了209Bi与中子反应的所有截面、角分布和能谱,特别是发射中子、质子、氘、氚和α 粒子的双微分截面,γ产生截面和γ产生谱。理论计算结果与实验数据和评价库的结果进行了比较和分析,结果表明:无论是反应截面,还是能谱,现在的结果比ENDF/B-6和JENDL-3评价库中的结果与实验数据符合的更好、更合理。理论计算结果以ENDF/B-6格式推荐并提供使用。
Based on the experimental data of the total cross section, elastic scattering cross section, degenerative scattering cross section and elastic scattering angle distribution of 209Bi and neutron reaction, a series of neutron optical model potential parameters are obtained by automatically adjusting the potential parameters of optical model. Using this Group parameters and neutron energies below 20 MeV and taking into account the contributions of neutron direct inelastic scattering, all the cross sections, angular distributions and energy spectra of 209Bi reacting with neutrons were calculated, especially for neutron emission, Double Differential Cross Sections for Proton, Deuterium, Tritium and Alpha Particles, γ Generation Cross Section and γ Generation Spectrum. The results of theoretical calculations and experimental data and evaluation of the results of the library were compared and analyzed, the results show that: whether the cross-section of the reaction or energy spectrum, the current results than ENDF / B-6 and JENDL-3 evaluation of the results of the library and experimental data In line with better and more reasonable. Theoretical calculations are recommended and available in ENDF / B-6 format.