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The Penetration and Diffusion of Gamma-Rays in Water Using Spherical Geometry
Phys. Rev. 80, 154 – Published 15 October, 1950
DOI: https://doi.org/10.1103/PhysRev.80.154
Abstract
Ionization and Geiger-Müller counter measurements of gamma-rays were made in effectively spherical geometry up to a distance of 252.8 cm (16 mean free paths of the primary radiation) corresponding to an exponential attenuation of the primary radiation by a factor of 8.8×. The "build-up factor" was observed to climb up to 33.8 and approached closely the theoretically predicted trend of asymptotic variation . Preliminary information on the spectral distribution of the radiation is included.
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