摘要
为提高放射性气溶胶监测仪的灵敏度,消除天然本底即氡子体气溶胶的干扰是极为重要的。氡子体气溶胶分离器是利用氡子体气溶胶与人工放射性气溶胶的粒度特征的不同进行粒度分离采样的采样装置。将这种分离采样装置用于放射性气溶胶监测仪,在采样过程中将天然本底气溶胶预选掉大部分甚至绝大部分,这对于提高放射性气溶胶监测仪的灵敏度有极大的意义。本文对分离器的工作原理、刻度方法、实验结果以及需要注意的问题进行了介绍和讨论。
To improve the detectable limit of radioactive aerosol monitors, it is very important to eliminate the inter-ference of the natural background, i.e. radon and thoron daughter aerosol. A particle size selective separator is used as artificial radioactive aerosol sampler. This separator may keep artificial aerosol from the natural radon and thoron daughter aerosol base on their different particle sizes. With the aid of the separator, most of natural background aero-sol can be rejected in sampling radioactive aerosols, which is very helpful to improving sensitivity of the radioactive aerosol monitors. The separation principle and calibration method of the separator are presented,test results are given, and some problems one must pay attention to are discussed in the paper.
出处
《核技术》
CAS
CSCD
北大核心
2003年第4期315-320,共6页
Nuclear Techniques
关键词
氡Tu子体
人工放射性气溶胶
分离器
切割直径
压缩比
监测仪
Radon and thoron daughter, Artificial radioactive aerosol, Separator, Cut out diameter, Rejection radio
