波罗的海沿岸表层土壤中（239）钚、（137）铯、（210）铅和（40）钾空间分布的对比分析
Comparative analysis of (239)Pu, (137)Cs, (210)Pb and (40)K spatial distributions in the top soil layer at the Baltic coast.
作者信息
Luksiene B, Druteikiene R, Gvozdaite R, Gudelis A
机构信息
Nuclear and Environment Radioactivity Research Laboratory, Institute of Physics, Vilnius, Lithuania.
出版信息
J Environ Radioact. 2006;87(3):305-14. doi: 10.1016/j.jenvrad.2005.12.005. Epub 2006 Feb 21.
This paper presents the results of an investigation into the spatial distribution of radionuclides of artificial ((239,240)Pu, (137)Cs) and natural ((210)Pb, (40)K) origins in the upper (0-5 cm) soil layers on the Baltic coastline of Lithuania ( approximately 5 km(2) area). The samples were analysed by gamma ray spectrometry and combined radiochemical procedures. The highest (210)Pb, (239,240)Pu and (137)Cs activity concentrations were determined in the forest samples, whereas (40)K activity was rather homogeneous across the study area. Relatively high (239,240)Pu and (40)K activity concentrations were determined along the surf zone. The (210)Pb and (137)Cs activity concentrations showed a gradual increase from the surf zone to the forest. The average activity concentrations of (239,240)Pu, (137)Cs, (210)Pb and (40)K in the beach and forest samples, respectively, were as follows: 0.32+/-0.08 and 0.74+/-0.14; 50+/-4 and 1190+/-50; 4.7+/-2.0 and 48+/-6; 186+/-15 and 216+/-17 Bq/kg.
本文介绍了对立陶宛波罗的海海岸线（面积约5平方公里）上层（0 - 5厘米）土壤层中人工来源（（239,240）钚、（137）铯）和天然来源（（210）铅、（40）钾）的放射性核素空间分布的调查结果。通过伽马射线能谱法和联合放射化学程序对样品进行了分析。在森林样品中测定出最高的（210）铅、（239,240）钚和（137）铯活度浓度，而（40）钾活度在整个研究区域相当均匀。在冲浪区沿线测定出相对较高的（239,240）钚和（40）钾活度浓度。（210）铅和（137）铯活度浓度从冲浪区到森林呈逐渐增加趋势。海滩和森林样品中（239,240）钚、（137）铯、（210）铅和（40）钾的平均活度浓度分别如下：0.32±0.08和0.74±0.14；50±4和1190±50；4.7±2.0和48±6；186±15和216±17贝克勒尔/千克。
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