Abstract
The dose received by back-scattering at the front face of a thick layer of scattering material irradiated by a uniform beam of gamma-rays has been evaluated for beam directions between normal incidence and glancing incidence, for gamma-ray energies from 250 keV to 3 MeV. Results are given also for a half-slab, which is useful for building up re-entrant angles by superposition, and for a right-angled comer.
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