engleski

Distribution of Cs-137, K-40 and Be-7 in silver fir-tree (Abies alba L.) from Gorski Kotar, Croatia

Distribution of Cs-137, K-40 and Be-7 in tissues of the silver fir-tree was studied. Samples of the shoots were taken at six locations in Croatia during five years. Shoots were cut according to the year of growth and analysed. Distribution between needles and twigs was also studied. Samples of the tree rings and the bark were taken at three locations. Cs-137 and K-40 showed very similar distributions. Cs-137 and K-40 activities were age-dependent and increased in decreasing age of twigs and needles. The highest activities were measured in the youngest twigs. The highest Be-7 activities were found in the twigs.

Cs-137 ; K-40 ; Be-7 ; Abies alba L. ; distribution ; bioindicator

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