Energy Spectrum Resulting from Electron Slowing Down

The equation for the slowing down of electrons is cast in a form suitable for numerical calculations. Pilot calculations have been performed for source energies of 4mc^2 and 80mc^2 in Al and Pb. The spectrum of slowed-down electrons, which would be the reciprocal of the stopping power under the assumption of continuous slowing down, departs substantially from this elementary solution at the upper and lower energy ends of the spectrum. The departures are large throughout when bremsstrahlung is important. The accumulation of secondary knock-on electrons is also included in the calculations.