Abstract
The Ag L 3 -XANES for Ag metal and a series of Au-Ag alloys, AuAg 3 , AuAg and Au 3 Ag have been obtained by monitoring the intensity of the Ag L 3 -M 4,5 M 4,5 Auger electrons with high energy resolution. The selected 1 G 4 final state has a much longer lifetime than the L 3 core hole which results in a reduced lifetime broadening of the partial yield spectra. Subtle features which are predicted by theory and barely visible in total yield spectra are clearly resolved here. The experiment confirms the earlier conventional XANES observation that Ag gains d charge upon alloying with Au. Full-scale multiple scattering calculations have been carried out for the Ag L 3 -XANES of Ag and AuAg. The results are discussed in the context of electron charge redistribution and unoccupied densities of states.
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