Conversion of Depth-Dose Distributions from Slab to Spherical Geometries for Space-Shielding Applications

An approximate procedure has been developed to transform depth-dose distributions in simple slab targets so as to obtain the spatial distribution of dose in spherical target configurations for space-shielding applications. Emphasis is placed on the determination of electron and bremnsstrahlung dose, which would otherwise require more costly three-dimensional Monte Carlo calculations. For the electron-bremsstrahlung problems tested, results from the procedure require only a fraction of the computer time and are found to agree to within 10-20% as compared to direct, three-dimensional Monte Carlo calculations.