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Human beings have always been exposed to natural radiations arising from within and outside the earth. In the present study the concentration of natural radio-nuclides 238U, 232Th and 40K and gamma radiation dose rate in soils of Yelagiri hills, Tamilnadu was determined by gamma ray spectrometry. The determined averageabsorbed dose rate value is 88.64 nGy h-1 which is slightlygreater than the world...
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