n+Ce^(140)核反应数据的理论计算及分析

Calculation and recommendation of n+Ce^(140) reactions

目的 为了获得中子入射Ce140核反应各种截面的理论计算值,以与现有的实验结果进行对照,并检验和完善所用的理论方法。方法 根据中子入射Ce140核反应的相关实验数据,用APOM94程序进行光学势自动调参,得到入射中子能量在0.01～20MeV之间的一组合适的中子光学势参数。在此基础上,用DWUCK4程序计算了直接非弹性截面,用SUNF程序计算了各反应道的反应截面。结果 分别得到总反应截面、(n,γ)道、(n,α)道、(n,p)道、(n,xn)道,以及形弹、去弹、非弹等的反应截面。结论 理论计算与实验值符合得很好,所用的理论模型是成功的,结果已被中国核数据中心(CNDC)收入。

Aim To obtain Various theoretical cross sections of n+Ce^(140) nuclear reactions,so that can have a contrast with experimental data, then to test and improve the theoretical model we used.MethodsAccording to the experimental data of n+Ce^(140) nuclear reactions respectively,the code APOM94 was used to adjust the optical potential parameters automatically.A set of proper neutron optical potential parameters was obtained in the energy range from 0.01 to 20 MeV.Based on this results,the code DWUCK4 was used to calculate the direct inelastic scattering cross section.The code SUNF was used to calculate the cross sections of all channels.ResultsThe total cross sections,(n,γ),(n,α),(n,p),(n,xn),elastic,nonelastic,inelastic cross sections was obtained respectively.ConclusionThe theoretical results are in good agreement with experimental data.The theoretical model used is successful. The results have been accepted by China Nuclear Data Centre (CNDC).