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Characteristics of the Environmental Radon and Thoron in Minamidaito-jima, a Comparatively High Background Radiation Island in Japan
https://repo.qst.go.jp/records/47369
https://repo.qst.go.jp/records/47369a357694b-6fc4-4508-b148-e3a15ba92c81
Item type | 学術雑誌論文 / Journal Article(1) | |||||
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公開日 | 2016-01-18 | |||||
タイトル | ||||||
タイトル | Characteristics of the Environmental Radon and Thoron in Minamidaito-jima, a Comparatively High Background Radiation Island in Japan | |||||
言語 | ||||||
言語 | eng | |||||
資源タイプ | ||||||
資源タイプ識別子 | http://purl.org/coar/resource_type/c_6501 | |||||
資源タイプ | journal article | |||||
アクセス権 | ||||||
アクセス権 | metadata only access | |||||
アクセス権URI | http://purl.org/coar/access_right/c_14cb | |||||
著者 |
Shiroma, Y.
× Shiroma, Y.× Hosoda, M.× Ishikawa, T.× Sahoo, S.K.× Tokonami, S.× Furukawa, M.× サフー サラタ クマール |
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抄録 | ||||||
内容記述タイプ | Abstract | |||||
内容記述 | General survey for the environmental radon and thoron has been performed in Minamidaitojima, Okinawa prefecture, southwestern part of Japan. In situ measurements of the radon and thoron exhalation rates were conducted at a total of 7 points using an accumulation technique with a ZnS(Ag) scintillation detector. The medians of radon and thoron exhalation rates were estimated to be 31 mBq m-2 s-1 and 3,970 mBq m-2 s-1, respectively. The atmospheric radon concentrations were measured at 2 points with an ionization chamber, and the maximum concentration was estimated to be 94 Bq m-3. For the surface soil samples collected at the measurement points of the exhalation rates, arithmetic means for 238U and 232Th series concentration were estimated to be approximately 145 Bq kg-1 dry and 101 Bq kg-1 dry, respectively. These results indicated that the environmental radon and thoron levels in Minamidaito-jima are fairly higher than those of the average of Japan. And it is strongly suggested that the exhalation rates and the concentrations are enhanced mainly due to the surface soil with the relatively high radioactivity. |
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書誌情報 |
Radiation Emergency Medicine 巻 4, 号 1, p. 27-33, 発行日 2015-11 |
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出版者 | ||||||
出版者 | Hirosaki University Press | |||||
ISSN | ||||||
収録物識別子タイプ | ISSN | |||||
収録物識別子 | 2186-8026 |