NE213闪烁体的n-γ分辨  

n-γ discrimination of NE213 scintillator

作　　者：叶邦角[1,2] Nanjyo H Kobayashi T Tsuno S Hasuko K 

机构地区：[1]中国科学技术大学近代物理系,合肥230026 [2]ICEPP,UniversityofTokyo,Hongo,Tokyo113,Japan [3]Department of Physics,Tsukuba University,Tsukuba,Japan

出　　处：《核技术》2003年第7期505-508,共4页Nuclear Techniques

摘　　要：NE213闪烁体广泛使用于探测快中子,但却伴随很高的g本底。本文使用快信号门与总信号门的两门积分方法,用快信号与总信号进行二维作图来分辨粒子。用252Cf 中子源和d+D核反应产生的单能中子研究了 f5"2"、f5"5"和f8"2"三种尺寸的NE213闪烁体的n-g分辨性能,通过选择合适的门宽,获得了极好的n-g分辨效果。对f5"2"的NE213,最佳快信号门宽为30ns。 摘要 NE213闪烁体广泛使用于探测快中子,但却伴随很高的g本底。本文使用快信号门与总信号门的两门积分方法,用快信号与总信号进行二维作图来分辨粒子。用252Cf 中子源和d+D核反应产生的单能中子研究了 f5"2"、f5"5"和f8"2"三种尺寸的NE213闪烁体的n-g分辨性能,通过选择合适的门宽,获得了极好的n-g分辨效果。对f5"2"的NE213,最佳快信号门宽为30ns。The NE213 scintillator has been widely used as a detector of fast neutrons, under environments with a high background of gamma rays. A technique using a two-gate integration method to do neutron-gamma pulse shape discrimination is reported. Fast and total signals are selected to make a two-dimensional plot. A 252Cf fission neutron source and the mono-energy neutrons produced by d+D reaction are used to investigate f5'2', f5'5' and f8'2' NE213 organic scintillators. By selecting a suitable gate range, we get the n-g discrimination extremely well. For the 5'2' NE213 scintillator, the optimal gate range of fast signal is 30ns.

关 键 词：NE213闪烁体 n-γ鉴别 d+D核反应 

分 类 号：O571.53[理学—粒子物理与原子核物理]