CAJ | 학술논문

由于大多数中子探测器在keV能区处于共振能区，截面数据无法精确已知，无法作为中子注量率测量初级标准装置。6 Li在keV能区的截面精确已知，本文以此设计了一种包含6 LiF转换体的硅半导体探测器系统（LiF-SSD探测器），建立了keV能区中子参考辐射场中子注量率测量初级标准装置。利用SRIM和T RIM程序估算了LiF-SSD探测器的计数率；基于Geant4开发了探测器响应计算程序，给出了中子能量为27.4 keV的探测器脉冲幅度计算谱；利用45 Sc（p ，n）45 Ti反应，测量了27.4 keV中子能量点的探测器脉冲幅度谱，测量结果与理论计算谱符合较好。
유우대다수중자탐측기재keV능구처우공진능구，절면수거무법정학이지，무법작위중자주량솔측량초급표준장치。6 Li재keV능구적절면정학이지，본문이차설계료일충포함6 LiF전환체적규반도체탐측기계통（LiF-SSD탐측기），건립료keV능구중자삼고복사장중자주량솔측량초급표준장치。이용SRIM화T RIM정서고산료LiF-SSD탐측기적계수솔；기우Geant4개발료탐측기향응계산정서，급출료중자능량위27.4 keV적탐측기맥충폭도계산보；이용45 Sc（p ，n）45 Ti반응，측량료27.4 keV중자능량점적탐측기맥충폭도보，측량결과여이론계산보부합교호。
Many types of neutron detectors are resonant in keV region ,and the cross section is not accurately known . Therefore , it can’ t be used as primary standard detector for neutron fluence rate measurement in keV region .The cross section of 6 Li is accurately known in this energy region ,and the LiF-SSD detector system was designed w hich consists of 6 LiF conversion and Si semiconductor detector .T he primary standard detector of neutron fluence rate measurement in keV region was established . The programs of SRIM and TRIM were used to evaluate the count rate of the LiF-SSD detector .The response of LiF-SSD detector calculation program was developed based on Geant4 .The pulse height distribution of 27.4 keV neutron was calculated .Based on the reaction of 45Sc(p ,n)45 Ti ,the pulse height distribution of 27.4 keV neutron was measured ,and it is close to calculation result .