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IJPAP Vol.48(07) [July 2010] >

Title: Evaluation and analysis of 226Ra, 232Th, 40K and radon exhalation rate in various grey cements
Authors: Varshney, Rati
Mahur, A K
Sonkawade, R G
Suhail, M A
Azam, A
Prasad, R
Keywords: Radon exhalation rate
Gamma ray spectroscopy
Radium equivalent activity
Gamma absorbed dose rate
Issue Date: Jul-2010
Publisher: CSIR
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 226Ra, 232Th and 40K, 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 226Ra, 232Th and 40K concentration, gamma absorbed dose rates and radon exhalation rates of grey cements collected from different manufacturers.
Page(s): 473-477
ISSN: 0975-1041 (Online); 0019-5596 (Print)
Source:IJPAP Vol.48(07) [July 2010]

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