Gamma-ray Dosimetry of Internal Emitters. III. Absorbed fractions for Low Energy Gamma Rays

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Abstract
Results of exact multiple scattering calculations carried out by means of the Monte Carlo method are presented for gamma-ray energies ranging from 20 to 100 keV. These results are formulated in terms of absorbed fraction, the fraction of the emitted gamma energy absorbed in a unit density tissue phantom of specified mass and shape. For central source and uniform source configurations, absorbed fractions for total body phantoms ranging in mass from 10 to 100 kg are given, as are results applicable to cases * of a uniform distribution of activity in organs of various shapes ranging in mass from 0.3 to 6 kg.