ELECTRON-ENERGY-LOSS LINEWIDTH FOR ELECTRONS REFLECTED FROM A NON-MONOCRISTALLINE SUBSTANCE

The quantum approach for analyzing reflection electron loss spectrosco py data is developed for electrons with energy less than 500 eV. A the oretical expression for relative intensity of line corresponding to lo sses due to bulk plasmon excitations in non-monocristalline substance has been obtained. This expression is based on the idea of single elas tic-inelastic scattering mechanism for the low-energy region. It is su itable for the investigations with angular resolution. For the line-wi dth, corresponding to bulk plasmon excitation, satisfactory agreement with experimental data for polycrystalline Al has been obtained.