用屏栅电离室测量^6Li（n,t）^4He反应微分截面  

Measurement of differential cross section for the 6Li(n，t)4He reaction by using gridded ionization chamber

作　　者：张国辉[1] 唐国有[1] 陈金象[1] 施兆民 刘广智[1] 张雪梅[2] 陈泽民[2] 

机构地区：[1]北京大学重离子物理研究所,北京100871 [2]清华大学物理系,北京100084

出　　处：《核技术》2001年第4期241-245,共5页Nuclear Techniques

基　　金：中国核数据中心资助项目 ;北京大学重离子物理研究所开放课题

摘　　要：用屏栅电离室对 3.6 7MeV与 4 .4 2MeV中子6Li(n ,t) 4He反应微分截面进行了测量。利用氘气体靶通过D(d ,n) 3 He反应产生中子 ,用BF3 和液闪探测器 (NE2 13)进行相对中子通量监测 ,绝对中子通量用2 3 8U(n ,f)与H(n ,p)反应来刻度。测量结果表明 ,氚的质心系微分截面在中子能量为 3.6 7MeV时很接近 90°对称 ,而到 4 .4By using a gridded ionization chamber, the differential cross sections and angle integrated cross sections for the 6Li(n,t) 4He reaction were measured at neutron energies of 3.67 and 4.42MeV. The neutrons were produced through D(d,n) 3He reaction by a deuteron gas target. Absolute neutron flux was determined through 238 U(n,f) and H(n,p) reactions. At 3.67MeV the differential cross section for triton is almost 90° symmetric but it is obviously forward peaked at 4.42MeV in the center-of-mass reference system.

关 键 词：屏栅电离室 微分截面 测量 中重核反应 带电粒子核反应 锂核 氦核 中子通量 

分 类 号：TL375.19[核科学技术—核技术及应用]