2009年7月
First results on (236)U levels in global fallout
SCIENCE OF THE TOTAL ENVIRONMENT
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- 巻
- 407
- 号
- 14
- 開始ページ
- 4238
- 終了ページ
- 4242
- 記述言語
- 英語
- 掲載種別
- 研究論文(学術雑誌)
- DOI
- 10.1016/j.scitotenv.2009.01.058
- 出版者・発行元
- ELSEVIER SCIENCE BV
The global fallout (236)U level in soil was deduced from measurements of (236)U, (239+240)Pu and (137)CS in surface soils which are solely influenced by global fallout A total of 12 soil cores from the depths of 0-10, 0-20 and 0-30 cm were collected at a flat forest area in Japan. Concentrations of (239+240)Pu and (238)U were determined by alpha-particle spectrometry. while the (236)U/(238)U ratio was measured with accelerator mass spectrometry (AMS). Consistent (236)U/(239)Pu ratios between 0.212 and 0.253 were found. Using this ratio, the total global fallout of (236)U on the earth is estimated to be as much as ca. 900 kg. This knowledge will contribute to the promotion of research on U isotopes, including (236)U, for the fields of geo-resources, waste management and geochemistry. (C) 2009 Elsevier B.V. All rights reserved.
- リンク情報
- ID情報
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- DOI : 10.1016/j.scitotenv.2009.01.058
- ISSN : 0048-9697
- Web of Science ID : WOS:000267199900005