Radioactivity measurement in the granites of North Karnataka, India and its radiological implications

The natural radioactivities due to uranium, thorium and potassium in granite samples contribute to the radiation dose received by human beings significantly. It is essential to evaluate the activity levels of these nuclides for the assessment of natural radiation dose. The natural radioactivity levels of some granite samples collected from different quarries of North Karnataka, India are estimated using high-resolution gamma ray spectrometry technique and the results are reported in this paper. (author)