^(56,54)Fe(n,α)^(53,51)Cr,^(56,54)Fe(n,p)^(56,54)Mn反应截面计算及普适性模型参数优化研究  

Study of the^(56,54)Fe(n,α)^(53,51)Cr,^(56,54)Fe(n,p)^(56,54)Mn Cross Sections and Universal Parameter Optimization

作　　者：霍东英 刘昌奇 韩超 吴康 胡志杰 户志鸣 于筱雪 姚泽恩[1,2] 韦峥[1,2] HUO Dongying;LIU Changqi;HAN Chao;WU Kang;HU Zhijie;HU Zhiming;YU Xiaoxue;YAO Zeen;WEI Zheng(School of Nuclear Science and Technology,Lanzhou University,Lanzhou 730000,China;Engineering Research Center for Neutron Application,Ministry of Education,Lanzhou University,Lanzhou 730000,China)

机构地区：[1]兰州大学核科学与技术学院,兰州730000 [2]兰州大学中子应用技术教育部工程研究中心,兰州730000

出　　处：《原子核物理评论》2021年第2期221-228,共8页Nuclear Physics Review

基　　金：国家自然科学基金资助项目(12075105,11875155,11705071);国家自然科学基金委员会-中国核工业集团有限公司核技术创新联合基金资助项目(U1867213);国家自然科学基金委员会与中国工程物理研究院联合基金资助项目(U1830102);兰州大学中央高校基本科研业务费专项资金资助项目(lzujbky-2021-kb09)。

摘　　要：基于中子与Fe发生反应产生“氢泡”,及“氦泡”对新型核能利用系统壁材料的影响,开展了中子诱发^(56,54)Fe(n,α)^(53,51)Cr,^(56,54)Fe(n,p)^(56,54)Mn反应截面计算研究工作。本工作根据现有的^(56,54)Fe(n,α)^(53,51)Cr,^(56,54)Fe(n,p)^(56,54)Mn反应实验数据、评价数据,对TALYS程序调用的物理模型(包括能级密度、对修正、核温度、光学势参数等)进行参数调校,得到了一组普适性强的模型参数。基于调校的参数,本工作采用核反应程序TALYS理论计算^(56,54)Fe(n,α)^(53,51)Cr,^(56,54)Fe(n,p)^(56,54)Mn反应的截面、能量微分截面以及双微分截面,全部数据都能与实验数据、评价数据符合较好,且适用于较宽的中子能量区间0~175 MeV。本工作提出了^(56,54)Fe(n,α)^(53,51)Cr,^(56,54)Fe(n,p)^(56,54)Mn反应的普适性模型参数,促进了核反应理论的发展,为核数据的评价奠定了基础。Based on the influence"hydrogen bubbles"and"helium bubbles",which are produced by the neutron induced reactions on Fe,of the new nuclear energy utilization system,the^(56,54)Fe(n,α)^(53,51)Cr,^(56,54)Fe(n,p)^(56,54)Mn cross sections are calculated in this work.The physical model(including energy level density,Correction,nuclear temperature,optical potential parameters,etc.)parameters were adjusted according to the existing experimental data and evaluation data of^(56,54)Fe(n,α)^(53,51)Cr,^(56,54)Fe(n,p)^(56,54)Mn cross sections,and a set of universal parameters were obtained.Based on the adjusted parameters,the TALYS program is used for calculating^(56,54)Fe(n,α)^(53,51)Cr,^(56,54)Fe(n,p)^(56,54)Mn reaction datas,including energy differential cross section and double differential cross section.Furthermore,the results are all in good agreement with the experimental data and evaluation data in the region of incident neutron energy from 0 to 175 MeV.By obtaining the universal parameters,new method was added to our nuclear reaction theory and laid the foundation for the nuclear data evaluation.

关 键 词：^(56 54)Fe(n α)^(53 51)Cr ^(56 54)Fe(n p)^(56 54)Mn 反应截面 微分截面 双微分截面 

分 类 号：O571.55[理学—粒子物理与原子核物理]