GÜMÜŞHANE İLİ ÇEVRESİNDE TOPLANAN TOPRAK VE KARAYOSUNU ÖRNEKLERİNDE DOĞAL (226Ra, 232Th ve 40K) ve YAPAY (137Cs) RADYOAKTİVİTE KONSANTRASYONLARININ BELİRLENMESİ

The aim of this study was to determine natural (226Ra, 232Ta and 40K) and artificial (radionuclides for soil and moss samples collected from the Gümüşhane province. Various soil and moss samples were collected from locations in Gümüşhane-Turkey. The total number of samples radionuclides, 137Cs activity concentration was measured in soil and moss moss samples. It was found that Cs activity concentration ranged from 7.63 to 39.44 Bq kg with for soil, and from 12.45 to 196.89 Bq kg for moss samples. Obtained values show that the mean radium equivalent activity (Raeq ) for soil and moss samples were 96 Bq.kg-1 and 157 Bq.kg-1, respectively. Raeqvalues of the measured samples are lower than the limit value of 370 Bq kg which is equivalent to a gamma dose of 1.5 mSv·y-1