![^1^3^7Cs and ^9^0Sr in live and dead reindeer lichens (genera Cladonia) from the ''Kraton-3'' underground nuclear explosion site [An article from: Journal of Environmental Radioactivity]](https://www.ebooknetworking.net/books/noimage.jpg)
^1^3^7Cs and ^9^0Sr in live and dead reindeer lichens (genera Cladonia) from the ''Kraton-3'' underground nuclear explosion site [An article from: Journal of Environmental Radioactivity]
Description
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Description:
The contents of ^1^3^7Cs and ^9^0Sr 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^oN 112.3^oE, event year - 1978) in Yakutia, Russia in 2002. The area contamination was within the range of 0.36-700 and 0.13-770kBqm^-^2 for ^1^3^7Cs and ^9^0Sr, 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 ^1^3^7Cs were detected in the upper part. The vertical distribution of ^9^0Sr was more or less homogeneous in the cushions of dead lichens. Elevated levels of ^1^3^7Cs and ^9^0Sr activity concentrations were also detected in the re-establishing young lichens growing over the residua of some dead lichens.
Description:
The contents of ^1^3^7Cs and ^9^0Sr 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^oN 112.3^oE, event year - 1978) in Yakutia, Russia in 2002. The area contamination was within the range of 0.36-700 and 0.13-770kBqm^-^2 for ^1^3^7Cs and ^9^0Sr, 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 ^1^3^7Cs were detected in the upper part. The vertical distribution of ^9^0Sr was more or less homogeneous in the cushions of dead lichens. Elevated levels of ^1^3^7Cs and ^9^0Sr activity concentrations were also detected in the re-establishing young lichens growing over the residua of some dead lichens.
