INELASTIC-SCATTERING OF HIGH-ENERGY ELECTRONS IN REAL SPACE

The propagation of elastic and inelastic electron waves in high-energy electron diffraction in a thin crystal foil is described in a real-space framework. Within the usual approximations of the "elastic" real-space method and applying the "single-elastic-into-inelastic" approach, a real-space slice expansion for inelastic electron waves is set up, which can be used for any type of inelastic scattering. Single-electron-excitation inelastic processes are discussed in more detail. In real space, the imaginary absorption potential for single-electron excitation can be computed for each atom individually, independent of the crystal structure and the accelerating voltage. In this work, these absorption potentials have been computed explicitly for all types of atoms and parametrized by a linear combination of four Gaussians. These parameters are tabulated. © 1990.