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Characterization of Pu concentration and its isotopic composition in soils of Gansu in northwestern China
https://repo.qst.go.jp/records/45361
https://repo.qst.go.jp/records/4536122364624-e68a-4798-a596-3a3b8ece798d
| Item type | 学術雑誌論文 / Journal Article(1) | |||||
|---|---|---|---|---|---|---|
| 公開日 | 2008-12-24 | |||||
| タイトル | ||||||
| タイトル | Characterization of Pu concentration and its isotopic composition in soils of Gansu in northwestern China | |||||
| 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 |
Zheng, Jian
× Zheng, Jian× Yamada, Masatoshi× Wu, Fengchang× Liao, Haiqing× 鄭 建× 山田 正俊× Ｗｕ Ｆｅｎｇｃｈａｎｇ× Ｌｉａｏ Ｈａｉｑｉｎｇ |
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| 抄録 | ||||||
| 内容記述タイプ | Abstract | |||||
| 内容記述 | The total 239+240Pu activities and 240Pu/239Pu atom ratios in surface soil samples (0-5 cm) in the Kumtag Desert in western Gansu Province, and in a soil core sample in Lanzhou were investigated using a sector-field ICP-MS. In the surface soil samples, 239+240Pu activities in fine particles (<150 m) were 1.3 to 2.1 times of those in coarse particles which ranged from 0.005 to 0.157 mBq/g. Atom ratios of 240Pu/239Pu in the surface soils ranged from 0.168 to 0.192 with a mean of 0.182  0.008. The mean ratio was similar to the typical global fallout value although the Kumtag Desert was believed to have received close-in fallout derived from Chinese nuclear weapons tests mainly conducted in the 1970s. Furthermore, the mean 240Pu/239Pu atom ratio observed in the soil core sample in Lanzhou was similar to the typical global fallout value. In the soil core sample, 239+240Pu activities in the various layers ranged from 0.012 to 0.23 mBq/g, and the inventory of 239+240Pu (32.4 Bq/m2, 0 -23 cm) was slightly lower than that expected from global fallout (42 Bq/m2) at the same latitude. Rapid downward migration of Pu isotopes was observed in Lanzhou soil core sample layers. The contribution of the 10 cm-deep top layers of surface soils to total inventory was only 17 %, while the contribution of deeper layers (10-23 cm) was as high as 83 %. The 239+240Pu activity levels and 240Pu/239Pu atom ratios in soils in Gansu Province, China are similar to those in atmospheric deposition samples collected in the spring in recent years in Japan. \nKeywords: Pu isotope pollution; SF-ICP-MS; Soils; Global fallout. |
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| 書誌情報 |
Journal of Environmental Radioactivity 巻 100, 号 1, p. 71-75, 発行日 2009-01 |
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| ISSN | ||||||
| 収録物識別子タイプ | ISSN | |||||
| 収録物識別子 | 0265-931X | |||||
