Abstract
A new computing algorithm has been developed to calculate the correction coefficient for a voluminous radiation source. The algorithm is based on the conception of a virtual efficiency center whose detector location depending on the radiation energy can be computed relatively to a point arbitrarily fixed on the detector axis. A scheme for the interaction of the gamma-radiation with the detector is proposed to minimize the number of preliminary experiments for the determination of empirical functions needed for realization of the method. Data are presented for computation of the linear attenuation coefficient of any material with known chemical composition and density. The validity of the developed approach has been proved by comparison of real and computed radioactivities for 5 different radiation energies in 12 cylindrical source-detector geometries.
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