沖縄本島における空間γ線線量率の自動車走行サーベイ

概要

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The absorbed dose rate in air due to terrestrial gamma radiation in Okinawa-jima, main island of Okinawa prefecture located in the subtropical region of Japan, was estimated at 4967 points on the paved roads by car-borne survey with NaI(Tl) scintillation survey meter. Based on the data that were converted inside into outside the car, the mean, minimum and maximum of the outdoor dose rates on the pavement were calculated to be 19.0, 10.4 and 47.7 nGy h＾-1, respectively. Also a contour map of the dose rate was made by simple interpolation. In general, it was found that the northern part of the island has higher dose rate compared with the southern one.
琉球大学理学部の論文
2014-03-31