基于确定论的 ZrH_x 中 H 热中子散射数据评价

ZrH_x has been widely used in nuclear technology because of its high H content and good moderating property. However, the thermal neutron scattering data generation of H in ZrH_x mostly uses direct numerical simulation method, which has not been evaluated with experimental data. In this paper, a fast determinstic evaluation method of thermal neutron scattering data of H in ZrH_x is presented, which is related to semi-empirical phonon model. It is completed by adjusting the thermal scattering data simulated by computer with the experimental data by using generalized least square method. The experimental data are based on the total cross-section measurements and the effective multiplication coefficient (k_eff) of the benchmark reactor. The results show that the optical range of the H phonon density in the modified ZrH_x is shifted to high energy region, and the total cross-section values are in good agreement with the experimental data. The accuracy of k_eff calculation for the two TRIGA reactors after adjustment has been improved.