狭缝式脉冲裂变中子靶室对γ的抑制能力  

A study of γ suppression ability for a slot-collimated PIN fission chamber

作　　者：马彦良[1] 欧阳晓平[1] 王群书[1] 李刚[1] 黎春华[1] 

机构地区：[1]西北核技术研究所,西安710024

出　　处：《核技术》2005年第8期617-620,共4页Nuclear Techniques

摘　　要：本文采用MCNP程序计算了狭缝式裂变中子探测系统的伽玛灵敏度。并根据探测系统对14MeV中子灵敏度的实测值,得到了系统n/γ分辨参数。满足了n/γ分辨能力大于5的设计要求。The sensitivity of a slot-collimated PIN fission chamber to gamma rays has been calculated by using MCNP-4B code. Based on the theoretical data and the measured 14 MeV neutron sensitivities, the n/γ discriminations for various configurations of the system have been obtained. The results indicate that the design of the system can meet the needs of practical measurements with n/γ discrimination of more than 5.

关 键 词：狭缝 裂变靶 伽玛射线 探测器灵敏度 

分 类 号：O571[理学—粒子物理与原子核物理] O572[理学—物理]