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The distribution of natural radionuclides in soil samples have been carried out in and around Hassan district, Karnataka, India by using Hyper Purity Germanium (HPGe) detector and natural ambient gamma dose rate were measured using portable GM survey meter ER-709. The activity concentration of radionuclides such as 226Ra, 232Th and 40K in soil samples of the study area are varies from 13.65±0.9 to 64±1.6, 19.43±0.9 to 185.5±1.8 and 197.85±9.8 to 1214±22.4 Bq kg-1 with a mean value of 39.40±1.3, 59.63±1.5 and 591.38±15.8 Bq kg-1 respectively. The radiological hazards such as the radium equivalent activities (Raeq), external hazard index (Hex), internal hazard index (Hin), gamma index (Iγ), gamma absorbed dose and annual effective dose associated with the natural radioactivity in soil samples were calculated and compared with global average values.
Srinivasa et al. (Fri,) studied this question.