Radioactivity in the Soils of Akoko Area of Ondo State Southwestern Nigeria
Abstract
The average concentration of the radioactivity in soil of Akoko area of Ondo State Nigeria, 20years after Chernobyl nuclear power plant accident have been, measured by means of a well-calibrated high-purity germanium detector. The photo-peaks observed with reliable regularity belonged to the naturally occurring series-decay radionuclides headed by 238U and 232Th as well as the non-series decay type 40K. Twenty years after the nuclear accident, 137CS was detected in all the sampled areas of Ondo State, with an average of 1.12±0.38 Bq kg-1, the time interval being two-third the 137Cs half life (30.2years). The mean activity concentration values of 39.24±1.12, 52.86±1.40 and 445.02±12.24 Bq kg-1 for 238U, 232Th and 40K respectively were obtained for the state.
Keywords: radioactivity, radionuclides, concentration, exposure, radiation
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ISSN (Paper)2224-719X ISSN (Online)2225-0638
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