19.1MeV中子诱发^(235)U裂变质量分布研究  

MASS DISTRIBUTION IN 19.1 MeV NEUTRON-INDUCED FISSION OF ^(235)U

作　　者：鲍杰[1] 刘永辉[1] 杨毅[1] 冯晶[1] 李泽[2] 崔安智[2] 孙宏清[2] 张生栋[2] 郭景儒[2] 

机构地区：[1]中国原子能科学研究院核物理研究所,北京102413 [2]中国原子能科学研究院放射化学研究所,北京102413

出　　处：《核化学与放射化学》2002年第2期122-125,共4页Journal of Nuclear and Radiochemistry

摘　　要：用双裂变电离室测量了靶物质碎片的裂变率 ,由阈探测器测量了中子能谱 ,用γ能谱法测量了 19 1Mev中子诱发2 3 5U裂变时95Zr,14 7Nd等 35种产物核素的产额。并绘制了产额chain yields are determined for the fission of 235 U induced by 19.1 MeV neutrons by HPGe γ ray spectrometry. Absolute fission rate is monitored with a double fission chamber. The efficiency of the fission chamber is checked with absolute determination of 198 Au activity from 197 Au(n,γ) 198 Au reaction for the first time. Fission product activities of irradiated 235 U foils are measured by HPGe γ ray spectrometry without chemical separation. Threshold detector method is used to estimate the fission events induced by neutrons of other energies.

关 键 词：中子诱发 质量分布 裂变产额 Γ能谱法 铀235 重核 裂变率 

分 类 号：O614.62[理学—无机化学] O571.44[理学—化学]