辐射防护2024，Vol.44Issue(6)：612-622,11.
水中总β放射性测量中样品质量厚度变化的影响及校正
Influence and correction of sample mass thickness variation for total β radioactivity measurement in water
杜云武 1邓晓钦 1毕朝文 1朱杰 1王亮 1王茜 1吕映赋 1王洋洋 1何岱1
作者信息
- 1. 四川省辐射环境管理监测中心站,成都 610031
- 折叠
摘要
Abstract
By using two sample media,the detection efficiency of natural and artificial β nuclides with different mass thickness was simulated by experiment and Monte Carlo Method.The relationship between detection efficiency,count rate,detection efficiency correction factor,reciprocal of detection efficiency and mass thickness,as well as detection efficiency and energy were analyzed.The results show that 40 K is used as the standard source,the detection efficiency correction factor are needed to correct the detection efficiency.The measurement of β radioactivity of 234 Th,210 Pb,212 Pb,228 Ra,60 Co,99 Tc,etc.should be modified by thin source method and detection efficiency correction factor.The reciprocal of detection efficiency is linear with the mass thickness,which can be used to scale the detection efficiency better.The detection efficiency is exponentially related to the average energy of beta rays.The β ray equivalence of KCl and CaSO4 media is good and can meet the requirements of relevant standards.关键词
β放射性核素/质量厚度/探测效率/校正因子Key words
β nuclide/mass thickness/detection efficiency/correction factor分类
资源环境引用本文复制引用
杜云武,邓晓钦,毕朝文,朱杰,王亮,王茜,吕映赋,王洋洋,何岱..水中总β放射性测量中样品质量厚度变化的影响及校正[J].辐射防护,2024,44(6):612-622,11.
