^(95)Zr(n,γ)^(96)Zr的间接测量  

Indirect Measurement of ^(95)Zr(n,γ)^(96)Zr

作　　者：颜胜权[1] 李志宏[1] 王友宝[1] K.Nishio H.Maki 苏俊[1] 李云居[1] I.Nishinaka K.Hirose 韩银录[1] 郭冰[1] 曾晟[1] 连钢[1] 陈永寿[1] 柳卫平[1] 

机构地区：[1]中国原子能科学研究院,北京102413 [2]日本原子力研发机构

出　　处：《原子核物理评论》2017年第3期420-424,共5页Nuclear Physics Review

基　　金：国家重点研发计划资助项目(2016YFA0400502);国家自然科学基金资助项目(11375269;11490560;11321064);国家重点基础研究发展计划(2013CB834406)~~

摘　　要：^(95)Zr(n,γ)^(96)Zr是稳定燃烧的恒星中合成^(96)Zr的唯一途径,对研究恒星演化和重元素合成具有重要的意义。由于^(95)Zr半衰期为64 d,直接测量^(95)Zr(n,γ)^(96)Zr截面极为困难,因此,本工作采用替代比率法间接测量^(95)Zr(n,γ)^(96)Zr截面。本工作测量了^(94)Zr(^(18)O,^(16)Oγ)^(96)Zr和^(90)Zr(^(18)O,^(16)Oγ)^(92)Zr反应,得到了复合核^(96)Zr*和^(90)Zr*衰变到γ道的几率比,并利用截面已知的^(91)Zr(n,γ)^(92)Zr截面乘以实验所测比率,得到了En=0～8 Me V能区的^(95)Zr(n,γ)^(96)Zr中子俘获截面。95^Zr（n,γ）96^Zrcross section is important for the study of stellar evolution and heavy elements nucleosynthesis because the reaction is the only way to produce the96 Zr in Asymptotic giant branch stars. The direct measurement of^（95）Zr（n,γ）^（96）Zr is very difficult due to the short half-life of95^ Zr, 64 days. The surrogate ratio method was carried out to measure95^Zr（n,γ）96^Zr cross sections. We measured the94^ Zr^18 O,16^ Oγ^96^ Zr and^（90） Zr^18 O,16^ Oγ^92 Zr reactions and obtained the γ-decay probability ratio of compound nuclei^（96） Zr＊and92^ Zr＊.The95^Zr（n,γ）96^Zrcross section is determined by the obtained ratio multiplying the known95^Zr（n,γ）96^Zr cross section at En = 0～8 Me V.

关 键 词：替代比率法 中子俘获截面 不稳定核 

分 类 号：O571.1[理学—粒子物理与原子核物理]