量研学術機関リポジトリ「QST-Repository」は、国立研究開発法人 量子科学技術研究開発機構に所属する職員等が生み出した学術成果（学会誌発表論文、学会発表、研究開発報告書、特許等）を集積しインターネット上で広く公開するサービスです。 Welcome to QST-Repository where we accumulates and discloses the academic research results(Journal Publications, Conference presentation, Research and Development Report, Patent, etc.) of the members of National Institutes for Quantum Science and Technology.
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Radiation exposure due to 222Rn is recognized as a matter of international concern for its health risk to humans. Portable devices for 222Rn concentration measurements, which are user-friendly, can be easily installed and provides a direct readout of values of 222Rn concentration on the built-in LCD (liquid-crystal display) and internal storage. However, there is a possibility that 220Rn can influence experiments for 222Rn measurement because of some similarity in their element properties. In this preliminary study, the influence of 220Rn on the performance of two commercial portable devices for 222Rn measurements was investigated. It was found that the indicated value for radon concentration in these devices could be affected by the presence of thoron gas.
Evaluation of the Influence of Thoron on Portable Radon Measurement Devices
