Neutron And ~ (58,60) Micro Data Of The Ni Nuclear Reaction Theory Calculation

Nowadays,there still exists some disadvantages in the nuclear power system for commercial use which impeded the progress of the practical applications of the fission energy,such as the problem of the final disposal of the long-life, high radioactive nuclear waste materials;the low efficiency of the uranium utilization;the security issue et cetra.At the present time,the Accelerator-Driven clean nuclear power System(ADS) has been an efficient approach to resolve these problems. The design of the ADS system is based on the microscope nuclear reaction data which concern the security and the performance of the whole system directly. To study the nuclear reaction and the microscope nuclear reaction data in theory is not only very important to the design of the ADS system,but also significant to the further explore of the nuclear structure and its nature as well. The physics and technology fundamental research on the Accelerator-Driven clean nuclear power System,Chinese ADS projects,is divided into several sub-items by the range of study.This work belongs to No.03,one of the sub-items,which is mainly about the study of theory and calculation of microscope reaction data for neutron and proton induced reactions.In this work,based on the experimental data of total,nonelastic cross sections and elastic scattering angular distributions for n + Ni reactions, a set of neutron optical model potential parameters is obtained in the region of incident neutron energy below 30 MeV.All cross sections of neutron induced reaction,the elastic scattering angular distribution,the inelastic scattering angular distributions of discrete levels,neutron energy spectrum and double differential cross sections of neutrons emission are calculated and analyzed by using the optical model,the distorted wave Born approximation theory, and the semi-classical model of multi-step nuclear reaction processes based on the unified Hauser-Feshbach and exciton model in the energy region up to 20MeV. The calculated results in our work are all in good agreement with the experimental data.Meanwhile,the theoretical results are compared with other evaluated data from ENDF/B6 and JENDL-3.3,and our theoretical data are better than that of ENDF/B6 and JENDL-3.3. The results indicate that it is successful to predict nuclear reaction by using the optical model and the semi-classical model of multi-step nuclear reactionprocesses in theory.