Title of article :
137Cs and 90Sr in live and dead reindeer lichens (genera Cladonia) from the “Kraton-3” underground nuclear explosion site
Author/Authors :
V. Ramzaev، نويسنده , , A. Mishine، نويسنده , , M. Kaduka، نويسنده , , L. Basalaeva، نويسنده , , J. Brown، نويسنده , , K.G. Andersson، نويسنده ,
Issue Information :
روزنامه با شماره پیاپی سال 2007
Pages :
16
From page :
84
To page :
99
Abstract :
The contents of 137Cs and 90Sr have been determined in 29 samples of live and dead reindeer lichens (genera Cladonia) collected at the “Kraton-3” underground nuclear explosion site (65.9°N 112.3°E, event year – 1978) in Yakutia, Russia in 2002. The area contamination was within the range of 0.36–700 and 0.13–770 kBq m−2 for 137Cs and 90Sr, respectively. The dead organisms were on average much more contaminated than the live ones. Vertical fractionation of the live lichen carpet demonstrated maximal activity concentrations of both radionuclides in the lower older section of the plants, while for the dead lichens the maximal activity concentrations of 137Cs were detected in the upper part. The vertical distribution of 90Sr was more or less homogeneous in the cushions of dead lichens. Elevated levels of 137Cs and 90Sr activity concentrations were also detected in the re-establishing young lichens growing over the residua of some dead lichens.
Keywords :
Nuclear accident , Atmospheric fallout , 137Cs , 90Sr , lichen , Kraton-3 , environmental contamination
Journal title :
Journal of Environmental Radioactivity
Serial Year :
2007
Journal title :
Journal of Environmental Radioactivity
Record number :
706830
Link To Document :
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