Online ISSN: 1884-4111 Print ISSN: 0033-8303
Radioisotopes 66(6): 227-234 (2017)

資料Materials (Data)

砂浜–砂丘系における自然γ線の線量率分布—鳥取砂丘の事例—Distribution of Natural γ Ray Dose Rates in a Beach-Dune System —A Case Study of the Tottori Dune—

1放射線地学研究所Radiation Earth Science Laboratory ◇ 461–0024 愛知県名古屋市東区山口町9–6 ◇ 9–6 Yamaguchi-cho, Higashi-ku, Nagoya-shi, Aichi Pref. 461–0024, Japan

2宇陀ジオサークルUda Geoscience Club ◇ 633–0241 奈良県宇陀市榛原下井足1415 ◇ 1415 Shimoidani, Haibara, Uda-shi, Nara Pref. 633–0241, Japan

受付日:2017年1月16日Received: January 16, 2017
受理日:2017年2月24日Accepted: February 24, 2017
発行日:2017年6月15日Published: June 15, 2017


Natural γ ray dose rates were measured at 94 points in the Tottori Dune coast located in Tottori City, Tottori Prefecture. The dose rate increased gradually from the shoreline to the end of the beach, and revealed an approximately constant value on the slope and the entire area of the dune. As a result of spectrum measurements there, although the concentrations of both potassium and uranium in the beach amounted to almost the same levels as those in the dune, the concentrations of thorium in the dune were high compared to those in the beach. The peculiarity and commonality in natural γ ray dose rate distribution in each beach-dune system were described by comparing with the cases of three dunes in the Enshu-nada coast measured so far.

Key words: natural γ ray; dose rate; Tottori dune; beach

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