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Cs135/Cs137 isotopic ratio as a new tracer of radiocesium released from the Fukushima nuclear accident
https://repo.qst.go.jp/records/46796
https://repo.qst.go.jp/records/46796e413e207-9755-49b0-ba1d-05b73d005b45
| Item type | 学術雑誌論文 / Journal Article(1) | |||||
|---|---|---|---|---|---|---|
| 公開日 | 2014-07-29 | |||||
| タイトル | ||||||
| タイトル | Cs135/Cs137 isotopic ratio as a new tracer of radiocesium released from the Fukushima nuclear accident | |||||
| 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 |
鄭, 建
× 鄭, 建× 田上, 恵子× ト, 文庭× 内田, 滋夫× 渡辺, 嘉人× 久保田, 善久× 府馬, 正一× et.al× 鄭 建× 田上 恵子× ト 文庭× 内田 滋夫× 渡辺 嘉人× 久保田 善久× 府馬 正一 |
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| 抄録 | ||||||
| 内容記述タイプ | Abstract | |||||
| 内容記述 | Since the Fukushima Daiichi nuclear power plant (FDNPP) accident in 2011, intensive studies on the distribution of released fission products, in particular 134Cs and 137Cs, in the environment have been conducted. However, the release sources, that is, whether the damaged reactors or the spent fuel pools, have not been identified, which resulted in a great variation in the estimated amounts of 137Cs released. Here, we investigated heavily contaminated environmental samples (litter, lichen and soil) collected from Fukushima forests for the long-lived 135Cs (half-life, 2x106 y), which is usually difficult to be measured using decay-counting techniques. Using a newly developed triple quadrupole ICP-MS/MS we analyzed the 135Cs/137Cs isotopic ratio of the FDNPP-released radiocesium in environmental samples. We demonstrated that radiocesium was mainly released from the Unit 2 reactor. Considering the fact that the widely used tracer for the released Fukushima accident-sourced radiocesium in the environment, the activity ratio of 134Cs/137Cs, will become unavailable in the near future due to the short half-life of 134Cs (2.06 y), the 135Cs/137Cs isotopic ratio can be considered as a new tracer for source identification and long-term estimation of the mobility of released radiocesium in the environment. | |||||
| 書誌情報 |
Environmental Science & Technology 巻 48, 号 10, p. 5433-5438, 発行日 2014-04 |
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| 出版者 | ||||||
| 出版者 | ACS Publishinos | |||||
| DOI | ||||||
| 識別子タイプ | DOI | |||||
| 関連識別子 | dx.doi.org/10.1021/es500403h | |||||
