CAJ | 학술논문

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1．0×10-4 cm2。
사용Geant4모의연구료기우취을희복사전환재료적THGEM쾌중자탐측기적복사전환특성。결과표명，탐측기향응구유일정역특성，기령민도、향응역치수복사체후도、흡수층후도、중자입사각도、복사체면적변화이개변。중자수직입사，취을희복사체후도50μm、려흡수층후도10μm시，탐측기역상향응구유교호적평특성，역치위2．2 MeV，령민도위1．0×10-4 cm2。
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 direc-tion of neutrons,and the radiator's areas.The response threshold to the neutrons from vertical direction is about 2.2 MeV and the detection sensitivity is 1.0 ×10 -4 cps˙cm2˙s while the radiator is 50 μm thick and the absorber is 10μm thick as the response curve presents a flat shape.