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Radioactivity and radon emanation fraction of the granites sampled at Misasa and Badgastein

三朝とバドガシュタインで採取された花崗岩試料の放射能とラドン散逸割合

迫田 晃弘*   ; 花元 克巳*; 石森 有  ; 永松 知洋*; 山岡 聖典*

Sakoda, Akihiro*; Hanamoto, Katsumi*; Ishimori, Yuu; Nagamatsu, Tomohiro*; Yamaoka, Kiyonori*

ラドン治療で世界的に有名な三朝とバドガシュタインで採取された花崗岩試料の特徴を調査するために、化学成組成分析,放射能測定,ラドン散逸量と散逸割合の測定を行った。三朝の花崗岩は石英,ソーダ長石,微斜長石が主成分だった。バドガシュタインの花崗岩は石英と白雲母が主成分だった。三朝の花崗岩はラドン散逸量と散逸割合は、その$$^{226}$$Ra放射能濃度にもかかわらず、バドガシュタインの花崗岩のそれらよりもかなり高かった。

The chemical composition was analyzed and the radioactivity, radon exhalation rate and emanation fraction were measured to investigate the characteristics of the granites sampled at Misasa and Badgastein, world famous for radon therapy. The Misasa granite was probably composed of quartz, albite and microcline. The Badgastein granite was probably composed of quartz and muscovite. The radon exhalation rates and emanation fractions of the Misasa granite were much higher than those of the Badgastein granite, regardless of the $$^{226}$$Ra activity concentrations.

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パーセンタイル:88.13

分野:Chemistry, Inorganic & Nuclear

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