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dc.contributor.authorPereira, Christa E-
dc.contributor.authorVaidyan, V K-
dc.contributor.authorSunil, A-
dc.contributor.authorByju, S Ben-
dc.contributor.authorJose, Reeba Maria-
dc.contributor.authorJojo, P J-
dc.identifier.issn0975-1041 (Online); 0019-5596 (Print)-
dc.description.abstractBuilding materials are one of the potential sources of indoor radioactivity because of the naturally occurring radio nuclides in them. External as well as internal exposures are the two pathways of radiation dose imparted to the human beings from the building materials. Natural clay is the main raw material for the production of bricks and tiles. In the present study, samples of cement, bricks, floor and wall tiles have been analyzed for the primordial radio nuclides namely, uranium, thorium and potassium using gamma ray spectrometry. Radon exhalation rates of these materials were also measured. Among the samples analyzed, the minimum radium equivalent activity was found in bricks (66.08 Bqkg−1) and the maximum was found in cement (225.46 Bqkg−1). External gamma dose, effective dose equivalent, internal and external hazard indexes resulting from the radio nuclides were also determined. The radon exhalation rates from building materials were found to vary between 10.5±2.8 and 82.8±8.2 mBqh−1m−2.en_US
dc.publisherNISCAIR-CSIR, Indiaen_US
dc.rights CC Attribution-Noncommercial-No Derivative Works 2.5 Indiaen_US
dc.sourceIJPAP Vol.49(06) [June 2011]en_US
dc.subjectBuilding materialsen_US
dc.subjectHazard indexen_US
dc.subjectRadon exhalationen_US
dc.titleRadiological assessment of cement and clay based building materials from southern coastal region of Keralaen_US
Appears in Collections:IJPAP Vol.49(06) [June 2011]

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