锂玻璃探测器^(6)Li原子数标定  

Calibration of^(6)Li atomic number of lithium glass detector

作　　者：安力[1] 肖军 王新华[1] 谢雷[1] 蒋励[1] 杨杰成 郭海萍[1] 韩子杰[1] An Li;Xiao Jun;Wang Xinhua;Xie Lei;Jiang Li;Yang Jiecheng;Guo Haiping;Han Zijie(Institute of Nuclear Physics and Chemistry,CAEP,Mianyang 621900,China)

机构地区：[1]中国工程物理研究院核物理与化学研究所,四川绵阳621900

出　　处：《强激光与粒子束》2024年第12期102-108,共7页High Power Laser and Particle Beams

摘　　要：在聚变包层中子学性能的实验检验中,造氚率是重要的测量参数之一,探测器中^(6)Li原子数目作为计算造氚率的归一化因子,是决定测量结果精度的关键因素,必须进行精确标定。对^(6)Li原子数标定原理、实验配置及过程、不确定度量化方法进行具体介绍,并首次在中国绵阳研究堆(CMRR)的M5水平孔道以锗单晶单色器获得32.36 meV中子对小型锂玻璃探测器中^(6)Li原子数进行了标定,不确定度为2.62%。In experimental validations of fusion blanket neutronics performance,tritium production rate is one of the most crucial measurement parameters.The number of ^(6)Li atoms in the detector,as a normalization factor for calculating the tritium production rate,is a key factor determining the accuracy of measurement results and must be accurately calibrated.This paper specifically introduces the principles of calibrating the number of^(6)Li,the experimental setup and procedure,and the methods for quantifying uncertainties.For the first time,the number of^(6)Li atoms in a small lithium glass detector was calibrated using a germanium monocrystal monochromator to obtain 32.36 meV neutrons at the M5 horizontal channel of the China Mianyang Research Reactor(CMRR),with an uncertainty of 2.62%.

关 键 词：锗单晶单色器 中子通量密度 锂玻璃探测器 ^(6)Li原子数 造氚率 

分 类 号：O571.5[理学—粒子物理与原子核物理]