The application of pseudopotentials to low-energy electron diffraction III: The simplifying effect of inelastic scattering

TLDR: In this paper, the consequences of absorbing low-energy electrons from a band structure point of view were discussed from the perspective of band structure and the effect of elastic scattering on low energy electrons.

Abstract: The consequences of absorptive processes for low-energy electrons are discussed from a band structure point of view. By introducing sufficient absorption as an imaginary component of the potential, calculated widths of peaks in the diffraction intensities are fitted to experiment, yielding an estimate for the inelastic intensity-extinction distance of 6 A at E = 70 ev in nickel. Such strong absorption, together with the nature of the elastic scattering, tends to confine flux in the crystal to a narrow cone about the incident beam, making feasible an accurate approximate scheme of calculation which constitutes a considerable simplification on present, formally exact, schemes.