WEKO3
アイテム
Seasonal variation of Pu flux and Pu atom ratio in the west Northwestern Pacific
https://repo.qst.go.jp/records/53940
https://repo.qst.go.jp/records/53940be228aaa-3960-4481-accc-910c70100425
| Item type | 会議発表論文 / Conference Paper(1) | |||||
|---|---|---|---|---|---|---|
| 公開日 | 2008-04-17 | |||||
| タイトル | ||||||
| タイトル | Seasonal variation of Pu flux and Pu atom ratio in the west Northwestern Pacific | |||||
| 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_5794 | |||||
| 資源タイプ | conference paper | |||||
| 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× 鄭 建× 山田 正俊 |
|||||
| 抄録 | ||||||
| 内容記述タイプ | Abstract | |||||
| 内容記述 | We examined the vertical distributions of 239+240Pu activity and 240Pu/239Pu atom ratio in settling particles and quantified the particulate 239+240Pu fluxes in the water column in the western Northwest Pacific. Time-series settling particle samples were collected using sediment traps to examine the seasonal variation of Pu flux and 240Pu/239Pu atom ratio. Plutonium isotopes were analyzed using a sector field high resolution ICP-MS. To the best of our knowledge, this is the first time that both Pu activity and Pu isotope ratio data have been obtained for settling particles in the Pacific Ocean. The high (> 0.18) 240Pu/239Pu atom ratios in settling particles indicate that plutonium from the Pacific Proving Grounds (PPG) source in the central Pacific is transported toward the western Northwest Pacific. Evidence indicates that Pu scavenging onto the settling particles is strongly dependent upon the bulk mass flux. | |||||
| 書誌情報 |
Proceedings of the Workshop on Environmental Radioactivity (KEK Proceedings) 巻 8, 号 2007-3, p. 52-57, 発行日 2008-02 |
|||||
