~(176)Hf(n,2n)~(175)Hf和~(185)Re(n,2n)~(184)Re~(m,g)反应截面研究

THE CROSS SECTIONS OF ~(176)Hf(n, 2n) ~(175)Hf AND ~(185)Re (n, 2n ) ~(184)Re~(m,g) REACTIONS

摘要: 用中国原子能科学研究院HI－13串列加速器、高压倍加器和北京大学4．5MV静电加速器分别获得能量为10～12、14和18MeV的中子，测量了(176)Hf（n，2n）和(185)Re（n，2n）的反应截面，并与现有的实验数据作了比较，初步搞清了分歧的主要原因和激发函数的走向。用中国核数据中心UNF理论程序和系统学程序计算了激发函数曲线形状并与国际数据库ENDF／B－6、JEF－2、JENDL－3、ADL－3和ENDL／A的推荐值在绝对值和曲线走向方面进行了比较，并给出推荐曲线。

Abstract: Measurements of neutron cross-section for 176H f (n, 2n ) 175H f and 185Re (n, 2n ) 184Rem,greactions are reported. In the experiment, the D (d, n ) 3He and T (d, n) 4He reactions are used as the neutron sources, neutron energy ranged from 10～12 MeV, about 14 MeV and 18 MeV. The neutron fluence is monitored by the 93Nb(n, 2n) 92Nbm reaction. Details of this experiment are described and the results are compared with ENDF/B-6, JEF-2,JENDL-3, ADL-3 and the data from literature.