電子式積算線量計を放射線監視に適用した場合の測定誤差(第2部:和文論文)

概要

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An electronic dosimeter can be substituted for thermoluminescent dosimeters (TLDs) and radiophoto-luminescence glass dosimeters (RLPDs) in environmental radiation measurements. The dosimeter used here can record the time variation of the dose. Not only the integrated dose, but also the change of the dose rate can be grasped by means of the dosimeter. The measurement error of the dosimeters was examined. The instrumental error is small, being less than 4%. The systematic sensitivity difference was not recognized. The measurement error of 1μSv, which is the minimum dose for unit recording, was around 9%. At an integrated dose of 15μSv, the measurement error was less than 5%. Therefore, highly precise radiation monitoring is possible without checking individual sensitivity. The lower limit dose for detection, which can judge whether the dose exceeds the background, was 0.21μSv through integrating 1μSv. When irradiation was conducted at 1.05μSv/h for 2h, the data was obtained for an approximate time of irradiation as well as the total dose. The dosimeter is suitable for radiation monitoring around X-ray generators or accelerators, where radiation is generated intermittently.