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狭缝式高灵敏裂变中子探测系统

A high sensitive fission neutron detector system with a lead slot collimator

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【Author】 Ouyang Xiao_Ping 1)2) Li Zhen_Fu 2) Wang Qun_Shu 1)2) Huo Yu_Kun 3) Ma Yian_Liang 2) Zhang Qian_Mei 2) Zhang Guo_Guang 2) Jin Yu_Ren 2) 1) (Department of Engineering Physics, Tsinghua University, Beijing 100084, China) 2) (Northwestern Institute of Nuclear Technology, Xi’an 710024, China) 3) (Institute of Modern Physics, Fudan University, Shanghai 200433, China)

【机构】清华大学工程物理系；西北核技术研究所；复旦大学现代物理研究所；西北核技术研究所北京100084；西安710024；北京100084；上海200433；西安710024；

【摘要】研制了狭缝_外延式高灵敏大面积PIN裂变中子探测系统.其对14MeV,2·5MeV中子灵敏度可达10-16C·cm2,比原有典型的脉冲裂变中子探测系统高4个量级.采用外延式铅狭缝准直结构,研制灵敏区尺寸为60mm,厚度为200μm—300μm的大面积PIN半导体探测器、以Be膜为衬底,有效直径为60的235U裂变靶,解决了该探测器研制中的高灵敏度和n/γ分辨难题.该系统已在实践中获得成功应用.更多还原

【Abstract】 A fission neutron detector system with frontward_extended lead slot collimator has been developed and tested. By designing the slot collimator and developing large area PIN detectors as well as large area fissionable target with thin Be backing, this detector system can reach high neutron sensitivities up to 10 -16 C·cm2, which is about 4₅ orders of magnitude higher than that of existing fission detectors,and high n/γ discrimination ratio up to 30.更多还原

【关键词】裂变中子探测系统；大面积PIN探测器；大面积裂变靶；高灵敏探测系统；
【Key words】 neutron detection； high sensitivity； high n/γ discrimination； fission； Be backing；

【文献出处】物理学报 ,Acta Physica Sinica , 编辑部邮箱 ,2005年10期

【分类号】TL816.3
【被引频次】21
【下载频次】203

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