Abstract
Intensities of photoelectron and photo-excited Auger electron peaks observed in X-ray photoelectron spectroscopy of copper have been analyzed using a background optimization formalism. The relative intensities of L 2, 3MM peaks are proportional to those predicted by Auger transition probabilities. However, their absolute intensities are stronger than those of holes created by 2p photoemission. Measurement by monochromatic X-ray photoelectron spectroscopy indicates that there is a contribution from a 2s hole by Coster-Kronig transition. Moreover, a spectrum of a conventional (non-monochromatic) source suggests additional 2s and 2p holes by the accompanying Bremsstrahlung.
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