This manuscript describes the natural radioactivity and its health
hazard effects due to building materials. An overview of other
natural radioactivity sources like uranium, radium, thorium and
potassium and, also the types of radiations has been discussed. A
brief description of radiation units, exposure limits and
guidelines given by International Commission on Radiological
Protection is also given. It represents a brief description of
radium, thorium and potassium measurement techniques, materials and
instruments used in the present study. The building material have
been analyzed for radium analysis using Gama Ray Spectroscopy
technique. The activity content has been determined by calculating
the concentration of these elements in the different building
material samples, taken from different areas.
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