产生长寿命核的几个(n,2n)反应截面的测量  

Measurement of Some (n,2n) Reaction Cross Sections for Producing Long Half-Life Residues

作　　者：王永昌[1] 袁俊谦[1] 杨景康[1] 孔祥忠[1] 任忠良 王化民 

机构地区：[1]兰州大学现代物理系,730001

出　　处：《高能物理与核物理》1992年第8期731-735,共5页High Energy Physics and Nuclear Physics

摘　　要：本文报道了E_n=13.5—14.8MeV中子能区几个长寿命生成核的(n,2n)反应截面的测量。测量方法是以^(93)Nb(n,2n)^(92m)Nb反应截面为中子注量标准的相对活化法。测量的几个反应为:^(151)Eu(n,2n)^(150m)Eu、^(153)Eu(n,2n)^(152)Eu、^(159)Tb(n,2n)^(158)Tb和^(109)Ag(n,2n)~*108)mAg。中子能量是用铌锆截面比法测定的。本文的结果和已收集到的测量结果进行了比较。Measurement of (n, 2n) reaction cross sections for some nuclides, whose residues have long half-lives, is described. The activation method relative to the ^(93)Nb (n,2n)^(92m)Nb reaction cross section was used. The cross sections of the ^(151)Eu (n, 2n)^(150m)Eu,^(153)Eu(n, 2n)^(152)Eu, ^(159)Tb(n, 2n)^(158)Tb and ^(109)Ag(n, 2n)^(108m)Ag reactions in the neutron energy range of 13.50—14.80 MeV were measured. The neutron energies in this experiment were determined by means of the method of cross section ratios for ^(90)Zr(n,2n)^(80m+g)Zr and ^(93)Nb(n,2n)^(92m)Nb reactions. The results obtained were compared with other existing data.

关 键 词：截面值 测量 长寿命核 反应截面 

分 类 号：O571.55[理学—粒子物理与原子核物理]