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Self-absorption correction and efficiency calibration for radioactivity measurement of environmental samples by gamma-ray spectrometry

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Misiak R. , Hajduk R. , Stobiński M. , Bartyzel M. , Szarłowicz K. , Kubica B.

tom Vol. 56, No. 1

23-28

In this work empirical functions which relate the full-energy peak efficiency with sample height, energy, matrix composition and bulk density for voluminal samples in a cylindrical counting geometry were found. Accurate determination of the radioactivity of gamma-emitting radionuclides in environmental samples requires taking into account self-absorption. For the obtained self-absorption correction factor, a direct transmission method was chosen. Finally, this paper proposes a simple correlation between the self-absorption correction factor and the bulk density and height of the measured sample for a given energy.