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In the surface soil samples, 239+240Pu activities in fine particles (\u003c150 \u0026#61549;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 \u0026#61617; 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. \n\\nKeywords: Pu isotope pollution; SF-ICP-MS; Soils; Global fallout.", "subitem_description_type": "Abstract"}]}, "item_8_source_id_9": {"attribute_name": "ISSN", "attribute_value_mlt": [{"subitem_source_identifier": "0265-931X", "subitem_source_identifier_type": "ISSN"}]}, "item_access_right": {"attribute_name": "アクセス権", "attribute_value_mlt": [{"subitem_access_right": "metadata only access", "subitem_access_right_uri": "http://purl.org/coar/access_right/c_14cb"}]}, "item_creator": {"attribute_name": "著者", "attribute_type": "creator", "attribute_value_mlt": [{"creatorNames": [{"creatorName": "Zheng, Jian"}], "nameIdentifiers": [{"nameIdentifier": "450610", "nameIdentifierScheme": "WEKO"}]}, {"creatorNames": [{"creatorName": "Yamada, Masatoshi"}], "nameIdentifiers": [{"nameIdentifier": "450611", "nameIdentifierScheme": "WEKO"}]}, {"creatorNames": [{"creatorName": "Wu, Fengchang"}], "nameIdentifiers": [{"nameIdentifier": "450612", "nameIdentifierScheme": "WEKO"}]}, {"creatorNames": [{"creatorName": "Liao, Haiqing"}], "nameIdentifiers": [{"nameIdentifier": "450613", "nameIdentifierScheme": "WEKO"}]}, {"creatorNames": [{"creatorName": "鄭 建", "creatorNameLang": "en"}], "nameIdentifiers": [{"nameIdentifier": "450614", "nameIdentifierScheme": "WEKO"}]}, {"creatorNames": [{"creatorName": "山田 正俊", "creatorNameLang": "en"}], "nameIdentifiers": [{"nameIdentifier": "450615", "nameIdentifierScheme": "WEKO"}]}, {"creatorNames": [{"creatorName": "Wu Fengchang", "creatorNameLang": "en"}], "nameIdentifiers": [{"nameIdentifier": "450616", "nameIdentifierScheme": "WEKO"}]}, {"creatorNames": [{"creatorName": "Liao Haiqing", "creatorNameLang": "en"}], "nameIdentifiers": [{"nameIdentifier": "450617", "nameIdentifierScheme": "WEKO"}]}]}, "item_language": {"attribute_name": "言語", "attribute_value_mlt": [{"subitem_language": "eng"}]}, "item_resource_type": {"attribute_name": "資源タイプ", "attribute_value_mlt": [{"resourcetype": "journal article", "resourceuri": "http://purl.org/coar/resource_type/c_6501"}]}, "item_title": "Characterization of Pu concentration and its isotopic composition in soils of Gansu in northwestern China", "item_titles": {"attribute_name": "タイトル", "attribute_value_mlt": [{"subitem_title": "Characterization of Pu concentration and its isotopic composition in soils of Gansu in northwestern China"}]}, "item_type_id": "8", "owner": "1", "path": ["1"], "permalink_uri": "https://repo.qst.go.jp/records/45361", "pubdate": {"attribute_name": "公開日", "attribute_value": "2008-12-24"}, "publish_date": "2008-12-24", "publish_status": "0", "recid": "45361", "relation": {}, "relation_version_is_last": true, "title": ["Characterization of Pu concentration and its isotopic composition in soils of Gansu in northwestern China"], "weko_shared_id": -1}
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) | |||||
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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 |