^(220)Rn子体γ能谱测量中LaBr_3γ谱仪探测效率刻度  

The Calibration of the LaBr_3 Detection Efficiency for the Gamma Measurement of ^(220)Rn Daughters

作　　者：孙荣忠 康玺[1] 王郦彬 唐新海 SUN Rong-zhong;KANG Xi;WANG Li-bin;TANG Xin-hai(School of Nuclear Science and Technology,University of South China,Hengyang of Hunan Prov.421001,China)

机构地区：[1]南华大学,湖南衡阳421001

出　　处：《核电子学与探测技术》2018年第4期525-528,共4页Nuclear Electronics & Detection Technology

基　　金：湖南省大学生创新性学习与创新性实验计划项目(2016-302)资助

摘　　要：基于标准点源(^(60)Co、^(137)Cs)测量与MC模拟计算,对LaBr_3探测器的结构尺寸进行了优化,并通过模拟计算获得了La Br3探测器对^(222)Rn/^(220)Rn子体采样滤膜的探测效率。^(222)Rn子体滤膜源效率实验验证表明,LaBr_3探测器对^(222)Rn/^(220)Rn子体采样滤膜的探测效率模拟值与实际值的相对误差在3%以内。该研究结果为实现^(220)Rn子体的γ能谱准确测量打下了基础。The dimensions of the LaBr3 detector were optimized based on the standard point source(60Co、137Cs) measurements and Monte Carlo simulation. The detection efficiency of the LaBr3 detector to the sample filter was simulated for the gamma ray spectrometry measurement of the 222Rn/220Rn daughters.The detection efficiency measurement of the LaBr3 detector to the standard222Rn daughter filter source showed that the relative error between the simulated values and the actual value should be within 3%. The results lay the foundation for accurate measurement of 220Rn daughters using gamma spectrum.

关 键 词：220Rn子体:探测效率 MC模拟 LaBr3探测器 

分 类 号：TL[核科学技术]