Abstract
Low-energy electron energy loss (LE-EELS) spectra have been calculated by a generalization of $R$-matrix methods to solid state systems. The scattering processes involved in LE-EELS can be explained by an atomic model. The contribution of exchange scattering in the calculated loss spectra is important over a large energy range of incident electron energies and is comparable in strength with direct scattering. The ratio of spin-flip to nonflip intensity in LE-EELS depends on the magnetic structure of the target, the type of transition involved (triplet-triplet or triplet-singlet), and the scattering geometry.
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