1 兵庫医科大学薬学部School of Pharmacy, Hyogo Medical University
2 兵庫医科大学大学院薬学研究科Graduate School of Pharmacy, Hyogo Medical University
法令改正により，放射線測定器の点検及び校正を1年毎に組み合わせて行うことが規定された。そこで，天然放射性核種を含有する市販試薬を線源としたサーベイメータの簡易点検法を検討した。遮蔽試験による放射線の指数関数に従う減衰と，40K及び87Rbの放射能濃度に対する計数値に良好な直線性と再現性が認められ，これらの評価に基づく簡易点検法を構築した。本法による放射線測定器の信頼性確保が期待される。
According to the revision of act on the regulation of radioisotopes in 2023, inspection and calibration of radiation measuring instruments has been obligated. In this study, inspection methods for survey meters using commercially available reagents containing natural radionuclides as a radiation source was investigated. As a result of shielding test, the linearity and reproducibility of attenuation was confirmed. Furthermore, correlation of radiation counts with concentration of 40K and 87Rb radioactivity was founded. Based on these results, a simple inspection method for survey meters was established.
Key words: potassium-40; rubidium-87; survey meter; commercially available reagent; inspection
© Japan Radioisotope Association 2025. This is an open access article distributed under the Creative Commons Attribution 4.0 International (CC BY 4.0) License (https://creativecommons.org/licenses/by/4.0/)© Japan Radioisotope Association 2025. This is an open access article distributed under the Creative Commons Attribution 4.0 International (CC BY 4.0) License (https://creativecommons.org/licenses/by/4.0/)
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