强激光与粒子束2016，Vol.28Issue(10)：106002-1-106002-4,4.DOI:10.11884/HPLPB201628.151146
放射源探测效率的动态刻度方法
Dynamic calibration method for detection efficiency of radioactive source
摘要
Abstract
It is difficult to produce the radioactive standard gas source such as 1 3 3 Xe,which makes the calibration of gspec-trometers difficult.The uniform falling velocities of the 1 3 3 Ba disk source and 1 3 7 Cs point source were used to calibrate the detec-tion efficiency of 1 3 3 Xe volume source and 1 3 7 Cs linear source.The non-uniform falling velocities of 1 3 3 Ba disk source and 1 3 7 Cs point source were used to calibrate the detection efficiency of heterogeneous 1 3 3 Xe volume source and heterogeneous 1 3 7 Cs linear source.The results show that the detection efficiencies of 1 3 3 Xe were 0.1 55 (for ϕ46.8 mm × 20 mm sample)and 0.143 (forϕ63.5 mm×20 mm sample)respectively,obtained for the uniform falling velocity of the source,and the uncertainty was 8.4%(k =2).The deviation between the efficiency of the heterogeneously distributed volume source and the efficiency of uniform vol-ume source in 14%,and 23% for linear sources.Therefore,the deviation caused by heterogeneity must be corrected.关键词
探测效率/非均匀分布/动态刻度/气体源/蒙卡模拟Key words
detection efficiency/heterogeneous distribution/dynamic calibration/gas source/Monte Carlo simula-tion分类
能源科技引用本文复制引用
田自宁,欧阳晓平,韩斌,陈伟,苏川英,刘文彪,田言杰,冯天成..放射源探测效率的动态刻度方法[J].强激光与粒子束,2016,28(10):106002-1-106002-4,4.基金项目
国家自然科学基金项目(11405134) （11405134）
