Investigation Of Natural Y-radioactivity Of Soil And Rock Samples From The Kenticha Tantalite Processing Area Of The Sidamo Region

Soil and rock samples from a mining region in southern Ethiopia have been analysed forrnnatural gamma (y) radioactivity. A NaI(TI) scintillation spectrometer was used to select, outrnof 200 samples, those with a marked level of radioactivity above the background radiation.rnThen a high resolution p-type germanium detector, inside a passive lead shield lined internallyrnwith copper and aluminium, coupled to a Canberra S I 00 MCA card was employed to measurernthe y-radiation from each sample. The y-spectra obtained were then transferred to a CanberrarnMicroSampo software for further analysis. The radioactivity content of the samples has beenrndetermined and the results, which may serve as baseline data for future work in environmentalrnradiation monitoring, are discussed. The uranium and thorium activities have also beenrnestimated so as to provide preliminary information on which type of soil and rock one shouldrnconcentrate for possible prospecting of uranium and thorium minirals

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