The nuclear data of n+^(240;242;244)Pu reactions for incident energy below 200 MeV are calculated and evaluated to meet the requirement in the design of an accelerator-driven subcritical system. The optical model is u...The nuclear data of n+^(240;242;244)Pu reactions for incident energy below 200 MeV are calculated and evaluated to meet the requirement in the design of an accelerator-driven subcritical system. The optical model is used to calculate the total, nonelastic, shape elastic cross sections, shape elastic scattering angular distributions, and transmission coefficients. The distorted-wave Born approximation is applied to calculate the direct inelastic scatterings to the discrete excited states. The nuclear reaction statistical models and fission theory are applied to describe neutron, proton, deuteron, triton, helium-3, alpha and c emissions, and fission consistently. The results thus obtained are compared with experimental data and the evaluated data obtained from ENDF/B-VII.1 and JENDL-4.0.展开更多
基于球型光学模型、预平衡发射和Hauser-Feshbach统计等理论,编制了MENDF(Medium Ener-gy Nuclear Data for Fission)程序,该程序适用于裂变核在入射粒子能量低于200MeV的中低能区的全套核数据计算。对于中子和质子在200MeV以下诱发的...基于球型光学模型、预平衡发射和Hauser-Feshbach统计等理论,编制了MENDF(Medium Ener-gy Nuclear Data for Fission)程序,该程序适用于裂变核在入射粒子能量低于200MeV的中低能区的全套核数据计算。对于中子和质子在200MeV以下诱发的核反应,其全截面、反应截面、弹性散射微分截面、裂变截面和裂变中子谱、5种发射粒子的单举截面和相应的能谱等理论计算值与相应的实验值基本符合。MENDF在我国已被广泛用于核数据计算及建立中能核数据库。展开更多
基金supported by the National Natural Science Foundation of China-NSAF(No.U1630122)IAEA Coordinated Research Projects(CRPs)on Recommended Input Parameter Library(RIPL)for Fission Cross Section Calculations(No.20464)
文摘The nuclear data of n+^(240;242;244)Pu reactions for incident energy below 200 MeV are calculated and evaluated to meet the requirement in the design of an accelerator-driven subcritical system. The optical model is used to calculate the total, nonelastic, shape elastic cross sections, shape elastic scattering angular distributions, and transmission coefficients. The distorted-wave Born approximation is applied to calculate the direct inelastic scatterings to the discrete excited states. The nuclear reaction statistical models and fission theory are applied to describe neutron, proton, deuteron, triton, helium-3, alpha and c emissions, and fission consistently. The results thus obtained are compared with experimental data and the evaluated data obtained from ENDF/B-VII.1 and JENDL-4.0.
基金Major State Basic Research Development Program of China(2007CB209903)~~
文摘基于球型光学模型、预平衡发射和Hauser-Feshbach统计等理论,编制了MENDF(Medium Ener-gy Nuclear Data for Fission)程序,该程序适用于裂变核在入射粒子能量低于200MeV的中低能区的全套核数据计算。对于中子和质子在200MeV以下诱发的核反应,其全截面、反应截面、弹性散射微分截面、裂变截面和裂变中子谱、5种发射粒子的单举截面和相应的能谱等理论计算值与相应的实验值基本符合。MENDF在我国已被广泛用于核数据计算及建立中能核数据库。
