Calculations of Doses Due to Electron-Photon Stray Radiation from a High Energy Electron Beam Behind Lateral Shielding

Doses due to stray radiation produced by high energy electrons are calculated for the shielding materials lead, iron, heavy and ordinary concrete, and sand. Source terms and absorption coefficients were determined using the Monte Carlo program EGS4 for 12 different target configurations, for primary energies between 0.15 and 50 GeV, and for the target materials iron and aluminium. The dependencies on the primary energy, target configurations, and angle of observation were studied. The results are compared with experimental values at 5 GeV; the agreement is good. The results are parameterised to facilitate dose calculations