著者

飯野 直子 金柿 主税

出版者

熊本大学

雑誌

熊本大学教育学部紀要 (ISSN:21881871)

巻号頁・発行日

vol.63, pp.357-362, 2014-12-12

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In order to examine the ability of a simple device to measure the environmental radiation dose rate level, we carried out a car-borne survey of gamma-ray dose rates in Kyushu. The obtained data was illustrated on the topographic and geological maps in Kyushu, along the run routes recorded by a GPS logger. It was found that the gamma-ray dose rate varies in the following cases: [1] the dose rate is maintained low level when the car passes an alluvial plain, such as the Tsukushi Plain and the Kumamoto Plain, [2] a downward tendency of the dose rate is observed when the car passes a basalt tableland, such as the Kitamatsuura Peninsula,[3] a remarkable increase of the dose rate is observed when the car passes a tunnel, [4] an upward tendency of the dose rate is observed when the car passes a mountainous road. These results suggest that the simple device is useful to obtain the environmental radiation dose rate level map as teaching materials.