Small-angle approximation and Oswald–Kasper–Gaukler theory of electron reflection from solids

Abstract

It is shown that the description of the process of electron ref lection from the surface of a solid in the small-angle approximation using the invariant embedding method is completely equivalent to Oswald–Kasper–Gaukler theory. The small-angle approximation is generalized to problems of the determination of the contributions of k-fold inelastic scattering to the energy spectrum of ref lected electrons. The theory is tested by comparing it with the results of other authors and with the data of exact calculations.