Radiometric Assessment of Natural Radioactivity Levels around Mrima Hill, Kenya

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dc.contributor.authorKebwaro, J. M.
dc.contributor.authorRathore, I. V.
dc.contributor.authorHashim, N. O.
dc.contributor.authorMustapha, A. O.
dc.date.accessioned2013-12-05T08:33:41Z
dc.date.available2013-12-05T08:33:41Z
dc.date.issued2011-03-10
dc.descriptionDOI: 10.5897/IJPS11.052en_US
dc.description.abstractMrima Hill, located in the South coast of Kenya is known for high natural background radiation, due to the presence of radiogenic heavy minerals such as monazites and carbonatites. The activity 23823240 concentration of U, Th and K in soil samples from the hill have been determined by gamma ray spectrometry using NaI(Tl) detector and decomposition of measured gamma-spectra. As a measure of radiation hazard to the public, gamma radiation dose rates were also estimated. The average activity 23823240-1 concentrations of U, Th and K were 207.0±11.3, 500.7±20.0 and 805.4±20.0 Bqkg, respectively. The mean absorbed dose rate in air is 440.7±16.8 nGyh-1 while the estimated annual average effective dose rate is 1.11±0.01 mSvy-1. The absorbed dose rate due to gamma radiation from naturally occurring radioactive materials is above the global average value of 60 nGyh-1 (UNSCEAR, 2000).en_US
dc.identifier.citationInternational Journal of the Physical Sciences Vol. 6(13), pp.3105-3110, 4 July, 2011en_US
dc.identifier.issn1992 -1950
dc.identifier.urihttp://ir-library.ku.ac.ke/handle/123456789/7809
dc.language.isoenen_US
dc.publisherInternational Journal of the Physical Sciencesen_US
dc.subjectHigh natural background radiationen_US
dc.subjectgamma ray spectrometryen_US
dc.subjectNaI(Tl) detectoren_US
dc.subjectMrima Hillen_US
dc.titleRadiometric Assessment of Natural Radioactivity Levels around Mrima Hill, Kenyaen_US
dc.typeArticleen_US
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