摘要
为解决强流混合场快中子注量率实时测量的难题,本文基于反冲质子法,以耐辐照性能强、噪声低的半绝缘型(SI)GaN半导体材料为基础,采用带石墨平衡体及聚乙烯转换靶的并联结构,设计补偿式电流型探测器的方案,有效地降低了γ射线灵敏度。利用该探测器测量了西安脉冲堆1#径向孔道内混合场的快中子注量率,其结果与已有测量结果符合较好,验证了该方案的可行性。
In order to solve the problem of fast neutron fluence rate real-time measurement in intense neutron-gamma mixed field,a new neutron fluence rate measurement scheme based on recoil proton method and semi-insulating（SI）GaN detector was proposed.The compensation current parallel structure with graphite balancer and polyethyene converting target for fast neutron fluence rate detection,which effectively reduced the interference ofγray and improved detection sensitivity of neutron radiation,was used in this scheme.This fast neutron fluence rate measurement scheme was implemented in the mixed field of Xi＇an Pulsed Reactor 1#radial channel,and the results show consistency with previous measurement results and the validity of the scheme.
出处
《原子能科学技术》
EI
CAS
CSCD
北大核心
2014年第12期2359-2363,共5页
Atomic Energy Science and Technology
基金
国家自然科学基金资助项目(11175142)
关键词
中子、γ混合场
反冲质子法
宽禁带半导体
快中子注量率
补偿电流并联结构
neutron-gamma mixed field
recoil proton method
wide-band semiconductor
fast neutron fluence rate
compensation current parallel structure
