Abstract
The angular dependence of Auger electrons emitted from a clean Ni (100) oriented single crystal surface has been measured using a small aperture retarding field analyzer. Angular distributions of the 62 eV M 2, 3 VV Auger electron emission show strong variations as a function of both polar and azimuthal angle. The experimental data are compared with calculated angular distributions obtained by ignoring the Auger transition itself and applying a multiple scattering formalism to the outgoing wave, assuming localized sources of atomic-like s, p, d, and f symmetry within the crystal. While this comparison demonstrates the importance of multiple scattering effects in the angular distribution, it also suggests that a quantitative understanding of the experimental data will only be achieved by a theory which includes Auger transition matrix elements as well as multiple scattering effects.
Published Version
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