THE BEHAVIOR OF CHERNOBYL CS-137, CS-134 AND RU-106 IN UNDISTURBED SOIL - IMPLICATIONS FOR EXTERNAL RADIATION
THE BEHAVIOR OF CHERNOBYL CS-137, CS-134 AND RU-106 IN UNDISTURBED SOIL - IMPLICATIONS FOR EXTERNAL RADIATION
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DOI：
10.1016/0265-931x(94)90080-9
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发表时间：
1994-01-01
影响因子：
2.3
通讯作者：
ROED, J
中科院分区：
文献类型：
--
作者：
ANDERSSON, KG;ROED, J
切尔诺贝利事故发生后，城市地区暴露表面上的Cs-137、Cs-134和Ru-106沉积物被发现是外部辐射剂量的主要贡献者。通过测定这些放射性核素在土壤中的垂直分布和顺序提取，研究了这些放射性核素在土壤中的固定。切尔诺贝利事故发生四年后，人们发现大部分铯仍然牢牢固定在最上面的2厘米处。在土壤的更深层，它的结合强度较小。研究发现，Ru的结合强度没有铯那么强，而且渗透得更深。这项研究表明，如果要显著减少对当地民众的长期辐射剂量，就需要采取对策。
Following the Chernobyl accident, deposits of Cs-137, Cs-134 and Ru-106 on exposed surfaces in urban areas were found to be the major contributors to the external radiation dose. The fixation of these radionuclides in soils was investigated by the determination of their vertical distribution in and through sequential extractions. Four years after the Chernobyl accident it was found that most of the caesium remained firmly fixed in the topmost 2 cm. In the deeper layers of the soil it was less strongly bound. The ruthenium was found to be less strongly bound than the caesium and had penetrated a little deeper. The study indicates the need for countermeasures if the long-term radiation dose to the local populace is to be reduced significantly.