APPLICATION OF GAMMA-RAY DIFFUSION THEORY TO RADIATION DOSIMETRY.
NEURO-RESEARCH FOUNDATION INC BROOKLINE MASS
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The diffusion equation governing gamma-ray transport has been evaluated in this study by means of random sampling and records of photon trajectories in tissue-like materials obtained for photon sources ranging in energy from 20 to 2750 keV. The records of photon interactions have been analyzed to obtain three kinds of information relevant to the dosimetry of gamma-ray sources within the mammalian body the average dose to a volume which contains radioactivity, the dose as a function of distance from a point source of activity in both bounded and unbounded absorbers, and the energy and angular distributions of the scattered photon fluence. These results are compared with other exact scattering calculations, traditional methods of calculating the gamma-ray dose, and experimentally determined point source functions. AUTHOR