Environmental radioactivity study of Austrian and Bavarian forest ecosystems: Long-term behaviour of contamination of soil, vegetation and wild boar and its radioecological coherences

摘要

Cs-137 and K-40 in soil, vegetation and flesh of wild boar samples from Austrian and Bavarian regions were investigated by gamma-ray spectrometry and Sr-90 in bones of wild boar with Liquid Scintillation Counting (LSC) after radiochemical separation. The soil core profiles revealed that 70-97% of the soil caesium content is still accumulated in the 0-10 cm soil depth. From all vegetation samples the mushrooms, particularly the bay boletus showed the highest Cs-137 contamination. The activity concentration of Cs-137 in muscle tissue of boar ranged from 14.9 +/- 1.5 Bq/kg (Bavaria) to 4711 +/- 377 Bq/kg (Lower Austria). In the bones of wild boars, Sr-90 activity concentration ranged from 1.4 +/- 0.2 Bq/kg (Bavaria) to 70.3 +/- 10.5 Bq/kg (Upper Austria).