MEND——一个计算250MeV以下中重核数据的程序

MEND——A Code for Calculating Nuclear Data of Medium-heavy Nuclei below 250 MeV

基于球型光学模型、预平衡发射和Hauser-Feshbach统计等理论,编制了MEND程序(Medium Energy Nuclear Data),该程序适用于中重原子核在入射粒子能量低于250 MeV的中低能区的全套核数据计算。对于中子和质子在250 MeV以下诱发的核反应,其全截面、反应截面、弹性散射微分截面、双微分截面和能谱等理论计算值与相应的实验值基本一致。MEND是计算中低能核反应的基础程序,在我国已被广泛用于核数据计算及建立中能核数据库。

Based on the spherical optical model,pre-equilibrium statistical theory,and Hauser-Feshbach theory,etc.,the code MEND（Medium Energy Nuclear Data） is written for calculating the complete set of nuclear data of medium-heavy nuclei in medium-low energy region（≤250 MeV）.For the reactions induced by neutron and proton below 250 MeV,the total cross sections,reaction cross sections,elastic scattering differential cross sections,double differential cross sections and energy spectra,etc.calculated by the code MEND,generally agree with those corresponding experimental data.MEND is a foundational program for nuclear reaction in medium-low energy region and is wildely used for nuclear data calculation and establishing ENDF/B6 format files of medium-low energy region in China.