240Pu/239Pu atom ratios in the bottom sediments of the NW Pacific Ocean

被引：21
|
作者：
Kim, CK
Kim, CS
Chang, BU
Choi, SW
Chung, CS
Hong, GH
Hirose, K
Pettersson, HBL
机构：
[1] Korea Inst Nucl Safety, Dept Radiol Safety Res, Taejon 305338, South Korea
[2] Korea Ocean Res & Dev Inst, Isotope Oceanog Lab, Seoul 425600, South Korea
[3] Meteorol Res Inst, Geochem Res Dept, Tsukuba, Ibaraki 3050052, Japan
[4] Linkoping Univ, Dept Radiat Phys, S-58185 Linkoping, Sweden
来源：
JOURNAL OF RADIOANALYTICAL AND NUCLEAR CHEMISTRY | 2003年 / 258卷 / 02期
关键词：
D O I：
10.1023/A:1026225402410
中图分类号：
O65 [分析化学];
学科分类号：
070302 ; 081704 ;
摘要：
Pu239+240 concentrations and Pu-240/Pu-239 atom ratios in bottom sediments of the Yellow Sea, Korea Strait, East Sea (Sea of Japan), Sea of Okhotsk, and Northwest Pacific Ocean were determined. In coastal sediments near the Korean Peninsula, Pu239+240 concentrations varied from 0.02 to 1.72 Bq.kg(-1), and their Pu-240 /Pu-239 atom ratios from 0.15 to 0.24, with an average of 0.20+/-0.03. Pu-240/Pu-239 atom ratios of bottom sediments in the deep NW Pacific Ocean and its marginal seas(East,Okhotsk seas) were in the range of 0.15-0.23. A little elevated Pu-240/Pu-239 atom ratios in the bottom layer sediment may be due to Pu released into the environment during the pre-moratorium period, having high Pu-240 /Pu-239 atom ratios and low Pu-238/Pu239+240 activity ratios.
引用
收藏
页码：265 / 268
页数：4
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