中能中子与^(58)Ni反应的理论计算

Calculation and Analysis of Neutron-Induced Reactions on ~58Ni below 150MeV

在中子与58Ni反应的总截面、去弹性散射截面和弹性散射角分布的实验数据基础上,获得了入射中子能量从0．825-150MeV的一组普适的中子与58Ni反应的光学模型势参数．利用光学模型、宽度涨落修正的Hauser-Feshbach理论、预平衡反应的激子模型和核内级联模型的中能核反应计算程序 MEND,计算了中子与58Ni反应的所有截面、角分布和能谱,并将理论计算结果与实验数据和评价数据进行了分析比较．

Based on the experimental data of the total, the nonelastic and the elastic cross sections and the elastic scattering angular distributions for n＋^58Ni reactions, a set of parameters for a neutron optical model potential is obtained in the incident neutron energy region from 0.8-150MeV. Then reaction cross sections, angular distributions, energy spectra, gamma-ray production cross sections and gamma-ray production energy spectra are calculated in terms of the optical model, the distorted wave Born approximation theory, the Hauser-Feshbach theory, the.exciton model and the cascade mechanism inside nuclear. The results are analyzed and compared with the existing experimental data and other evaluated data from ENBF/B-6. They are in agreement with each other within error bars.