Evaluation and analysis of 226 Ra, 232 Th, 40 K and radon exhalation rate in various grey cements

Abstract

The natural terrestrial gamma radiation dose rate is an important contribution to the average dose rate received by the world's population. Natural radio nuclides in building material are sources of external and internal radiation exposure in dwellings. The natural radioactivity and radon exhalation rate of the commonly used building construction material (grey cements) have been studied. Positive correlation was found between radium concentration and radon concentration. The external radiation exposure caused by gamma emitting radionuclide is determined from obtained values of 226 Ra, 232 Th and 40 K, using high purity Germanium Detector. The absorbed dose is found to be higher in the AMB cement. This study presents the results of estimation of 226 Ra, 232 Th and 40 K concentration, gamma absorbed dose rates and radon exhalation rates of grey cements collected from different manufacturers.