Radioactivity measurements in eastern Lesvos, Greece

The radioactive background of the eastern side Lesvos Island in Greece, an island rich natural radioactivity, was studied by means gamma ray spectroscopy. Dose rates and concentrations radionuclides (232Th series, 226Ra 40K) 137Cs were measured in-situ laboratory, respectively. A total twenty soil samples ten beach sand collected processed according to IAEA protocol. For measurement dose rate determination a portable NaI scintillation detector utilized. activity concentration calculations held using high-purity germanium detector. These also used estimate rates, so as compare obtained results with measurements. maximum detected values 232Th 226Ra, 40K found be 190, 90, 960 70 Bq kg-1, As for both estimated, 230 190 nGy h-1, significant difference regarding observed between two matrices (soil, sand), quite surpassing those samples. That can attributed granulometry each matrix. Furthermore, study attempts western Island, larger being part.