Experimental and theoretical study of CVV Auger peaks of selected aluminium and carbon compounds

The Auger valence peak of Al2O3, Al and carbon compounds (graphite, fullerene, carbides) has been studied experimentally and theoretically. It is demonstrated, from a comparison of the experimental spectrum with the self-convolution of the valence band, that the Al CVV transition in Al2O3 is an intra-atomic transition. The behaviour of the C KVV Auger peak is shown to be intermediate between atomic and band-like transitions. The different experimental carbide peaks could be reconstructed by a self-convolution of the valence band and the introduction of a hole-hole repulsion term extracted from the Cini-Sawatzki equation. A non-expected behaviour of the satellite peak at 280 eV for tungsten and chromium carbide is shown and interpreted, with a comparison with the Ramaker approach. Copyright © 2004 John Wiley & Sons, Ltd.SCOPUS: cp.jFLWIN