13.5—14.6MeV中子能区镓的同位素反应截面的测量  

Cross Section Measurements for (n,2n),(n,p) and (n,n′α)Reactions on Gallium Isotopes at the Neutron Energies of 13.5, 14.1 and 14.6 MeV

作　　者：蒲忠胜[1] 杨景康[1] 孔祥忠[1] 

机构地区：[1]兰州大学现代物理系,兰州730000

出　　处：《高能物理与核物理》2003年第7期581-584,共4页High Energy Physics and Nuclear Physics

摘　　要：报道了在 13.5— 14 .6MeV中子能区用活化法以93 Nb(n ,2n) 92mNb反应截面为中子注量标准测得的 69Ga(n ,2n) 68Ga ,69Ga(n ,p) 69mZn ,71Ga(n ,p) 71mZn和 71Ga(n ,n′α) 67Cu的反应截面值 .由 (13.5± 0 .2 ) ,(14 .1± 0 .1)和 (14 .6± 0 .2 )MeV中子引起的 69Ga(n ,2n) 68Ga反应截面值分别为 (794± 31) ,(86 9± 35 )和 (986± 39)mb ,71Ga(n ,n′α) 67Cu反应截面值分别为 (1.3± 0 .1) ,(1.7± 0 .1)和 (2 .5±0 .1)mb .在中子能量为 (14 .1± 0 .1)MeV能量点 ,69Ga(n ,p) 69mZn反应截面值为 (2 1.5± 1.0 )mb ,71Ga(n ,p) 71mZn反应截面值为 (12 .4± 0 .7)mb .单能中子由T(d ,n) 4 He反应获得 .文中还列举了尽可能收集到的数据以作比较 .Cross sections for (n,2n),(n,p) and (n,n′α) reactions have been measured on Gallium isotopes at the neutron energies of 13.5-14.6MeV using activation technique. The data of the cross sections are reported for the reactions of 69Ga(n,2n) 68Ga, 69Ga(n,p) 69mZn, 71Ga(n,p) 71mZn,and 71Ga(n,n′α) 67Cu. The cross sections of 69Ga(n,2n) 68Ga reaction are 794±31,869±35 and 986±39mb at 13.5±0.2,14.1±0.1 and 14.6± 0.2MeV incident neutron energies, respectively. The cross sections of 71Ga(n,n′α) 67Cu reaction are given:1.3±0.1,1.7±0.1 and 2.5±0.1mb at 13.5±0.2, 14.1±0.1 and 14.6± 0.2MeV, respectively. The cross section of 69Ga(n,p) 69mZn reaction is 21.5± 1.0mb at 14.1±0.1MeV. The cross section of 71Ga(n,p) 71mZn reaction is 12.4±0.7mb at 14.1±0.1MeV. The neutron fluences are determined by the cross sections of 93Nb(n,2n) 92mNb reaction.

关 键 词：原子核物理 核反应截面 活化法 放射性活度 镓同位素 中子能区 测量 

分 类 号：O571.4[理学—粒子物理与原子核物理]