Resuspension processes controll variations of 137Cs activity concentrations in the ground-level air

被引：17
|
作者：
Sykora, I. [1 ]
Povinec, P. P. [1 ]
Brest'akova, L. [1 ]
Florek, M. [1 ]
Holy, K. [1 ]
Masarik, J. [1 ]
机构：
[1] Comenius Univ, Fac Math Phys & Informat, Dept Nucl Phys & Biophys, Bratislava 84248, Slovakia
来源：
JOURNAL OF RADIOANALYTICAL AND NUCLEAR CHEMISTRY | 2012年 / 293卷 / 02期
关键词：
Atmospheric radioactivity; Aerosols; Global fallout; Radionuclides; Soil resuspension; SURFACE AIR; RADIONUCLIDES; BE-7; RADIOACTIVITY; SPECTROMETRY; DEPOSITION; FALLOUT;
D O I：
10.1007/s10967-012-1693-2
中图分类号：
O65 [分析化学];
学科分类号：
070302 ; 081704 ;
摘要：
The Cs-137 activity concentration in the surface air between 1977 and 2007 was decreasing with an ecological half-life of 3.4 years, however, during 2007-2010 the yearly averaged Cs-137 activity concentrations were almost constant. The increased atmospheric Cs-137 and K-40 levels observed during the winter may be due to surface soil resuspension and radionuclide transport by winds, particularly from open agricultural areas, as confirmed by high correlation coefficient between Cs-137 and K-40 atmospheric levels (R = 0.84), and similar Cs-137/K-40 activity ratios in aerosols (0.07) and soils (0.05).
引用
收藏
页码：595 / 599
页数：5
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