摘要
以14MeV快中子引起的52 Cr(n,2n)51 Cr反应截面的测量为例,研究热中子俘获反应对相应的快中子(n,2n)反应截面测量的影响.为比较热中子俘获反应50 Cr(n,γ)51 Cr对相应的快中子52 Cr(n,2n)51 Cr反应截面测量的影响,在对样品包镉和不包镉两种情况下,分别测量了14MeV中子引起的52 Cr(n,2n)51 Cr反应截面.单能中子用T(d,n)4 He反应获得,中子通量用监督反应93Nb(n,2n)92mNb测量,而中子能量通过93 Nb(n,2n)92mNb和90Zr(n,2n)89m+gZr截面比法测定.将本实验结果与尽可能收集到的其它作者发表的数据进行了比较.
The effect of the thermal neutron capture reaction on the cross section measurement of the corresponding （n,2n） reaction induced by fast neutron was researched taking cross section measurement of the ^52Cr（n,2n）^51 Cr reaction induced by fast neutrons around 14 MeV for example.The experiment has done twice （the first,the four groups of samples wrapped in pure cadmium foil were irradiated; the other,another four group of samples which weren＇t wrapped in pure cadmium foil,were done） in order to compare the effect of the thermal neutron capture reaction ^50Cr （n,γ）^51Cr on the cross section measurement of the corresponding ^52Cr （n,2n）^51Cr reaction induced by fast neutron The monoenergetic neutron was obtained from the T（d,n）^4He reaction,the neutron flux was determined using the monitor reaction ^93Nb（n,2n）^92mNb,and neutron energies were determined by the method of making cross-section ratios of ^93Nb（n,2n）^92mNb and ^90Zr（n,2n） ^89m＋gZr reactions.Furthermore,the results are also compared with the data published.
出处
《华中师范大学学报（自然科学版）》
CAS
北大核心
2014年第4期502-505,共4页
Journal of Central China Normal University：Natural Sciences
基金
河南省基础与前沿技术研究计划项目(142300410287
132300410302)
平顶山市科技创新杰出人才计划项目(2012060)
关键词
热中子俘获反应
快中子(n
2n)反应
截面
活化法
thermal neutron capture reaction
（n,2n） reaction induced by fast neutron
cross section
activation technique
