Fabrication and performance evaluation of GaN thermal neutron detectors with bm^6LiF conversion  

作　　者：Zhifu Zhu Zhijia Sun Jijun Zou Bin Tang Qinglei Xiu Renbo Wang Jinhui Qu Wenjuan Deng Shaotang Wang Junbo Peng Zhidong Wang Bin Tang Haiping Zhang 朱志甫;孙志嘉;邹继军;唐彬;修青磊;王仁波;瞿金辉;邓文娟;王少堂;彭俊波;王志栋;汤彬;张海平(State Key Laboratory Breeding Base of Nuclear Resources and Environment,East China University of Technology,Nanchang 330013,China;State Key Laboratory of Particle Detection and Electronics,Institute of High Energy Physics,Chinese Academy of Sciences,Beijing 100049,China;Engineering Research Center of Nuclear Technology Application(East China University of Technology),Ministry of Education,Nanchang 330013,China;CGN Begood Technology Co.,Ltd.,Nanchang 330013,China)

机构地区：[1]State Key Laboratory Breeding Base of Nuclear Resources and Environment,East China University of Technology,Nanchang 330013,China [2]State Key Laboratory of Particle Detection and Electronics,Institute of High Energy Physics,Chinese Academy of Sciences,Beijing 100049,China [3]Engineering Research Center of Nuclear Technology Application(East China University of Technology),Ministry of Education,Nanchang 330013,China [4]CGN Begood Technology Co.,Ltd.,Nanchang 330013,China

出　　处：《Chinese Physics B》2020年第9期217-221,共5页中国物理B（英文版）

基　　金：Project supported by the National Natural Science Foundation of China(Grant Nos.61964001 and 61961001);the State Key Laboratory of Particle Detection and Electronics(Grant No.SKLPDE-KF-2019);the Natural Science Foundation of Jiangxi Province,China(Grant Nos.20192BAB207033 and 20181BAB202026);the Foundation of State Key Laboratory Breeding Base of Nuclear Resources and Environment(East China Institute of Technology)(Grant No.NRE1515);the Jiangxi Provincial Postdoctoral Science Foundation,China(Grant No.2018KY31).

摘　　要：A GaN-based pin neutron detector with a 6LiF conversion layer was fabricated, and can be used to detect thermal neutrons. Measurement of the electrical characteristic of the GaN-based pin neutron detector showed that the reverse leakage current of the neutron detector was reduced significantly after deposition of a 6LiF conversion layer on the detector surface. The thermal neutrons used in this experiment were obtained from an 241Am-Be fast neutron source after being moderated by 100-mm-thick high-density polyethylene. The experimental results show that the detector with 16.9-μm thick 6LiF achieved a maximum neutron detection efficiency of 1.9% at a reverse bias of 0 V, which is less than the theoretical detection efficiency of 4.1% calculated for our GaN neutron detectors.

关 键 词：thermal neutron GAN DETECTOR ^6LiF 

分 类 号：TL816.3[核科学技术—核技术及应用]