摘要
针对目前空气氡浓度测量中存在的测量灵敏度低、测量时间长的缺点,对比研究及理论探讨后提出一种空气氡浓度瞬时测量方法。常压空气脉冲电离室对氡和其子体均有较高的探测效率,符合高灵敏度测量要求。在电离室内部加入氡及其子体收集装置实现空气中氡及其子体的快速抓样收集,克服了氡子体对电离室污染问题,符合瞬时测氡要求。通过实验初步验证了本文方案的可行性。
The current methods for air radon measurement are often of low sensitivity, and the measurement takes longer time. In this paper, based on comparative study and theoretic discussion, we propose an ionization chamber for consecutive air radon measurement. The ionization chamber under ordinary pressure has high detective efficiency in measuring radon and its daughters. A collector unit is equipped for collecting residual radon and its daughters in a measurement. This prevents radon and its daughters from polluting the ionization chamber for a subsequent measurement, a common problem with conventional methods of air radon detection. Feasibility of the design for instantaneous measurement of air radon has been proved in experiments.
出处
《核技术》
CAS
CSCD
北大核心
2009年第7期545-549,共5页
Nuclear Techniques
关键词
电离室
氡
Α粒子
测量
计数
Ionization chamber, Radon, α particle, Measuring, Count
