Abstract
The activity concentration of primordial radionuclides 226Ra, 232Th, and 40K in soil samples of Thirthahalli taluk were measured systematically by using a low background HPGe detector coupled to 16 K MCA. The measured activity concentration of 226Ra lies between 5.1 ± 0.2 and 79.5 ± 1.7 Bq kg−1with an average activity of 25.99 Bq kg−1, 232Th ranges from 5.1 ± 0.3 to 95.3 ± 2.2 Bq kg−1with an average activity of 33.60 Bq kg−1and that of 40K varies from 18.3 ± 1.5 to 833.4 ± 17.5 Bq kg−1with an average activity of 175.52 Bq kg−1. Higher concentration of these radionuclides were found in the soil samples where the regional geology is granites. The consequential gamma dose and the corresponding radiation hazard was also estimated and is found to be within the permissible limits. The possible radiological impact on the public was also determined and these results are presented in this paper.
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