^(252)Cf冷裂变瞬发γ射线  

Behaviour of Prompt Gamma-Ray Emission in Cold Fission of ^(252)Cf

作　　者：韩洪银[1] 李安利[1] 陈锦华 黄胜年[1] 

机构地区：[1]中国原子能科学研究院

出　　处：《高能物理与核物理》1995年第1期8-15,共8页High Energy Physics and Nuclear Physics

基　　金：中国国家自然科学基金委员会;中国核工业总公司

摘　　要：用四参量关联实验技术研究了２５２Ｃｆ冷裂变瞬发γ射线发射性质。孪生屏栅电离室收集极和栅极信号分别用于确定碎片的动能和发射角。圆柱形电离室轴线上的ＮａＩ（Ｔ１）晶体用于符合记录裂变瞬发γ射线．结果表明，不仅冷裂变瞬发γ射线角分布系数约为正常二分裂变值的两倍，而且冷裂变轻碎片发射的γ射线数目几乎是重碎片发射数目的三倍．对后一实验事实目前尚未有满意的理论解释．The behaviour of prompt γ-ray emission in the cold fission of 252Cf was investigated experimentally using a four-parameter correlation technique. A twin gridded ionization chamber was employed to detect the fission signals and to determinethe fragment emission angles, and a φ10cm×10cm NaI(T1) detector was used torecord the γ-ray energies. The result shows that the angular distribution coefficientof γ-rays emitted in cold fission is twice as large as that in the normal fission.The fact that in the cold fission the number of γ-rays emitted from the light fragments is approximately three times as large as that from the heavy ones can notbe explained satisfactorily so far.

关 键 词：^(252)Cf自发裂变 裂变碎片-γ射线符合 冷裂变特性 

分 类 号：O571.436[理学—粒子物理与原子核物理]