237Np in peat and lichen in Finland

被引：10
|
作者：
Salminen, S. [1 ]
Paatero, J. [2 ]
Roos, P. [3 ]
Helariutta, K. [1 ]
机构：
[1] Univ Helsinki, Lab Radiochem, FIN-00014 Helsinki, Finland
[2] Finnish Meteorol Inst, Arctic Res Programme, FIN-00101 Helsinki, Finland
[3] Riso Natl Lab, DK-4000 Roskilde, Denmark
来源：
JOURNAL OF RADIOANALYTICAL AND NUCLEAR CHEMISTRY | 2009年 / 281卷 / 03期
关键词：
Neptunium; Chernobyl; Peat; Deposition; GASTROINTESTINAL ABSORPTION; NEPTUNIUM; AMERICIUM; PLUTONIUM; FALLOUT; SAMPLES; DEPOSITION; BEHAVIOR; TRACER; CURIUM;
D O I：
10.1007/s10967-009-0007-9
中图分类号：
O65 [分析化学];
学科分类号：
070302 ; 081704 ;
摘要：
Activity concentrations of Np-237 in peat and lichen samples in Finland were determined and contributions from nuclear weapons testing in 1950-1960s and the Chernobyl accident were estimated. Np-237 was determined with ICP-MS using Np-235 as a tracer. Activity concentrations of Np-237 in peat samples varied between 1.98 +/- 0.05 and 14.1 +/- 0.3 mBq/m(2). The contribution from the Chernobyl accident to the total Np-237 deposition in peat was 0.1-13%, the Chernobyl-derived fraction of total Np-237 in peat being much lower than the previously determined corresponding Chernobyl-derived fractions of Pu239+240, Pu-241, Am-241 and Cm-244.
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收藏
页码：405 / 413
页数：9
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