SPECIFIČNA AKTIVNOST 40K I 137Cs U UZORCIMA ZEMLJE, SENA, MAHOVINE I MLEKA PRIKUPLJENIH SA PODRUČJA KOPAONIKA.

Kopaonik is the highest mountain in Serbia with excellent conditions for breeding large and small ruminants. It has many natural and cultural opulences and it's one of largest tourist center in Serbia. The aim of our research was to analyse specific concentration of 137Cs and 40K in environment of Kopaonik mountain, and to compare results with those mesured one year after the chernobyl accident on a same locations. Samples of soil, mosses, hay and milk were collected on a diferent altitude from six locations in townships Raška and Brus. Results have show that radioactive 137Cs is still present in environment of Kopaonik in samples of soil and mosses. The highest specific concentration of 137Cs in a soil has been mesured in Jošanička banja (142 Bq/kg), and in a mosses in Lisina (228 Bq/kg). In most samples of soil specific concentration of 137Cs was half lower compared with obtained values from 1987. and it matches its physical half-life period of 30 years. In the samples of hay and milk specific concentration of 137Cs was below detection limit, and it indicate that this radionuclide is not included in the food chain. [ABSTRACT FROM AUTHOR]