Abstract
Following a short discussion of the effects of the atomic environment on Auger spectra emitted from solids, it is demonstrated how X-ray-excited Auger spectroscopy can be used to obtain information on the electronic structure near the initial core hole and on electron correlation. Local charges determined using the cluster approximation are compared to those obtained from Auger parameter analysis, while relaxation/polarization effects and satellite structures in Auger spectra are interpreted in the cluster approach. The advantages of the combined use of the X-ray induced-Auger and photoelectron spectroscopies with theoretical cluster molecular orbital models in the studies of chemical and solid state effects on Auger processes are emphasized. The power of these methods is illustrated by recent results obtained for metals, alloys, and oxides of great practical importance.
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