Backscattering of megaelectronvolt electrons

Abstract

The solution of the boundary problem for the backscattering of fast electrons is obtained by means of the invariant imbedding method. The linearization procedure for the equation for the function of reflection is defended. It is shown that the continuous slowing-down approximation gives an adequate description of the reflection of megaelectronvolt electrons. An approach enabling us to estimate the contribution of electrons scattered once, twice, etc. in the energy distribution is developed. This approach gives more information about the electron reflection processes. Energy spectra of electrons reflected in the unit solid angle, energy distribution and total albedo of backscattered electrons were obtained. Comparison with experimental data shows that the theory developed gives satisfactory results for electrons with primary energy about of units of megaelectronvolts.