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首页> 外文期刊>World Journal of Nuclear Science and Technology >Method to Measure Indoor Radon Concentration in an Open Volume with Geiger-Mueller Counters: Analysis from First Principles
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Method to Measure Indoor Radon Concentration in an Open Volume with Geiger-Mueller Counters: Analysis from First Principles

机译：用Geiger-Mueller计数器测量开放体积中室内Rad浓度的方法：基于第一原理的分析

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摘要

A simple method employing a pair of pancake-style Geiger-Mueller (GM) counters for quantitative measurement of radon activity concentration (activity per unit volume) is described and demonstrated. The use of two GM counters, together with the basic theory derived in this paper, permit the detection of alpha particles from decay of and progeny ( 218Po, 214Po) and the conversion of the alpha count rate into a radon concentration. A unique feature of this method, in comparison with standard methodologies to measure radon concentration, is the absence of a fixed control volume. Advantages afforded by the reported GM method include: 1) it provides a direct in-situ value of radon level, thereby eliminating the need to send samples to an external testing laboratory; 2) it can be applied to monitoring radon levels exhibiting wide short-term variability; 3) it can yield short-term measurements of comparable accuracy and equivalent or higher precision than a commercial radon monitor sampling by passive diffusion; 4) it yields long-term measurements statistically equivalent to commercial radon monitors; 5) it uses the most commonly employed, overall least expensive, and most easily operated type of nuclear instrumentation. As such, the method is par-ticularly suitable for use by researchers, public health personnel, and home dwellers who prefer to monitor indoor radon levels themselves. The results of a consecutive 30-day sequence of 24 hour mean radon measurements by the proposed GM method and a commercial state-of-the-art radon monitor certified for radon testing are compared.
机译：描述并演示了使用一对煎饼式Geiger-Mueller（GM）计数器对for活度浓度（每单位体积的活度）进行定量测量的简单方法。通过使用两个GM计数器以及本文得出的基本理论，可以检测到来自后代和后代（218Po，214Po）的α粒子，并将α计数率转换为into浓度。与测量ra浓度的标准方法相比，该方法的独特之处在于没有固定的对照体积。所报道的GM方法所提供的优点包括：1）它提供了level水平的直接原位值，从而消除了将样品送到外部测试实验室的需要; 2）可用于监测表现出短期变化的ra水平; 3）与通过被动扩散的商业ra监测仪采样相比，它可以产生可比的精度和相当或更高的精度的短期测量; 4）产生的长期测量值在统计学上等同于商业ra监测器; 5）它使用最常用，总体上最便宜，最容易操作的核仪器。因此，该方法特别适合希望自己监控室内ra水平的研究人员，公共卫生人员和家庭居民使用。比较了通过拟议的GM方法连续30天进行的24小时平均ra测量的结果和经认证可进行ra测试的商业级ra监测仪。

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