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首页> 外文期刊>Applied radiation and isotopes: including data, instrumentation and methods for use in agriculture, industry and medicine >Retrospective radon assessment by means of 210Po activity measurements.
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Retrospective radon assessment by means of 210Po activity measurements.

机译：通过210Po活性测量进行回顾性ra评估。

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摘要

A method for retrospectively assessing the average radon concentration in a dwelling, for a period as long as 40 years or more, is described. It is based on the free penetration of radon gas into bulky spongy materials called volume traps, and subsequent trapping of radon decay products inside them. This leads to a build-up of 210Pb, a radon decay product with a half life of 22.3 years, which reaches an equilibrium with the alpha emitter 210Po, indicative of the average radon concentration over the exposure period. The stuffing of mattresses, chairs, cushions, etc. can be considered a good volume trap. A chemical separation procedure is described, transforming the volume trap into a 210Po alpha source, whose activity is determined through alpha spectroscopy. The technique has been applied in over 300 samples, retrieved from dwellings in Serbia, Germany, Norway and Sweden. The technique has proven to be very robust and reproducible. In cases where radon data were available during the exposure period of the volume trap, a remarkable agreement was found. The best volume traps appeared to be polyester sponges found in many stuffings. The major drawback is the destructive nature of the method, its major advantage is the direct relationship between the radon gas and the 210Po signal. The technique can be useful in epidemiological studies of the lung cancer risk from indoor radon, for assessing the long term radon exposure.
机译：描述了一种用于回顾评估房屋中长达40年或更长时间的平均ra浓度的方法。它基于on气自由渗透到称为体积阱的笨重的海绵状材料中，然后将them衰变产物捕获在其中。这导致了210Pb的积聚，这是don衰变产物，具有22.3年的半衰期，与α发射体210Po达到平衡，表明暴露期间的平均ra浓度。床垫，椅子，坐垫等的填充物可以被认为是一个良好的体积阱。描述了一种化学分离程序，将体积阱转换为210Poα离子源，其活性通过α光谱确定。该技术已应用于从塞尔维亚，德国，挪威和瑞典的住宅中取回的300多个样本中。该技术已被证明是非常可靠且可重复的。如果在体积阱的暴露期间有ra数据可用，则发现了显着的一致性。最好的体积陷阱似乎是在许多馅料中发现的聚酯海绵。主要缺点是该方法具有破坏性，其主要优点是ra气与210Po信号之间存在直接关系。该技术在室内of气致肺癌风险的流行病学研究中，可用于评估长期ra气暴露。

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