固体反冲质子辐射转换体THGEM快中子探测器特性模拟研究  

Simulation Study on the Characteristic of the THGEM Fast Neutron Detector Based on Solid Recoil Proton Radiation Convertor

作　　者：王强[1] 曾丽娜[1] 黄坡[1] 郑春[1] 

机构地区：[1]中国工程物理研究院核物理与化学研究所,绵阳621900

出　　处：《核电子学与探测技术》2014年第5期663-666,共4页Nuclear Electronics & Detection Technology

基　　金：中国工程物理研究院科学技术发展基金(2012B0103007);中国工程物理研究院科学技术发展基金(2012B0103006);国家自然科学基金青年科学基金(11305153)

摘　　要：使用Geant4模拟研究了基于聚乙烯辐射转换材料的THGEM快中子探测器的辐射转换特性。结果表明,探测器响应具有一定阈特性,其灵敏度、响应阈值随辐射体厚度、吸收层厚度、中子入射角度、辐射体面积变化而改变。中子垂直入射,聚乙烯辐射体厚度50μm、铝吸收层厚度10μm时,探测器阈上响应具有较好的坪特性,阈值为2.2 MeV,灵敏度为1.0×10-4cm2。Response characteristic of the THGEM fast neutron detector based on HDPE recoil proton radiation material is simulated by Geant4 toolkit.Results show that the detector has a threshold response,the detection sensitivity and the threshold are related to the thickness of the radiator and of the absorber,the injection direction of neutrons,and the radiator＇s areas.The response threshold to the neutrons from vertical direction is about2.2 MeV and the detection sensitivity is 1.0 × 10^-4cps cm^2˙ s while the radiator is 50 μm thick and the absorber is 10μm thick as the response curve presents a flat shape.

关 键 词：快中子 探测器 反冲质子 阈值 

分 类 号：TL816.3[核科学技术—核技术及应用]