1―2MeV能区~6Li(n,t)~4He反应微分截面与截面的实验测量  

Measurement of differential cross sections and cross sections of the ~6Li(n,t)~4He reaction in the 1―2MeV energy range

作　　者：张国辉[1] 陈金象[1] 唐国有[1] Gledenov Yu M Sedysheva M Khuukhenkhuu G 

机构地区：[1]北京大学物理学院重离子物理研究所和重离子物理教育部重点实验室 [2]Joint Institute for Nuclear Research, Dubna 141980, Russia

出　　处：《核技术》2006年第9期655-659,共5页Nuclear Techniques

基　　金：科技部中俄资源环境领域重大问题合作研究项目(2005CB724804);国家自然科学基金项目(10275001)资助;北京大学重离子物理教育部重点实验室开放课题

摘　　要：利用屏栅电离室对1.05、1.54及2.25MeV中子6Li(n,t)4He反应的微分截面与截面进行了实验测量。采用氚固体靶的T(p,n)3He反应产生准单能中子,用相对效率已知的BF3长中子管和238U裂变片相结合来测定绝对中子通量。将测量结果与已有数据进行了比较,1―2MeV能区6Li(n,t)4He反应截面的分歧在一定程度上得到了澄清。By using a gridded ionization chamber, the differential cross sections and angle integrated cross sections of the ^6 Li（n, t）^4 He reaction were measured at neutron energies of 1.05, 1.54 and 2.25 MeV. Neutrons were produced through the T（p, n）^3 He reaction. The absolute neutron flux was determined through a relatively calibrated BF3 long counter and a^238 U foil. Present results are compared with existing data, and the discrepancies for the cross sections of the ^6 Li（n, t）^4 He reaction in the 1 -2 MeV energy range are clarified to some extent.

关 键 词：屏栅电离室 ^6 Li(n r)^4 He反应 微分截面 截面 

分 类 号：O571.55[理学—粒子物理与原子核物理]