BACKSCATTERING OF FAST ELECTRONS

The inelastic reflection of fast electrons is investigated on the base of the "invariant imbedding method". The non-linear term in the integral equation can be neglected owing to the strong anisotropy of elastic cross-section of fast electrons. Using the Fokker-Planck approximation and the Laplace transformation a simple analytical formula is found expanding the backscattering coefficient into a series of Legendre polynomials. It is shown that the results from the model are in good quantitative agreement with experimental data.