We report the results of x-ray photoemission (XPS) and Auger electron spectroscopies in the alloy Au Pd& " for various concentrations. By comparing the predictions of the excited-atom version of the quasiatomic model with the dilute Au results, we show that charge-transfer corrections to the Au Auger kinetic-energy shift, hc. ;,k, are sma11. This result supports the validity of the relation be~k = bErA" -=EP "-EF(x-) [where EP " and EF(x) are the Fermi energies in pure Au and the alloy, respectively] and permits determination of the order of magnitude of the charge transfer from Auger measurements alone (i.e. , hundredths of electrons/atom). Such small charge transfer seems to hold also for the Ag and Cu atoms in Pd-Ag, Au-Ag, Pd-Cu, and Au-Cu. Furthermore, these results are consistent with interpretation of the Au Auger parameter shift, bg~", as well as with analysis of Ace ", the valence-electron contribution to the Au XPS core binding energy; we predict that bg=bco for noble metals in general. This analysis yields the result that the dilute Au dvalence-electron occupations change = -0.2 electrons/atom, approximately the negative of the sp change from isomer shifts. The Pd results are consistent with small charge transfer and a small gain of d electrons.

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Films were deposited from glow discharge plasmas of acetylene-oxygen-argon mixtures in a deposition system fed with radio frequency power. The principal variable was the proportion of oxygen in the gas feed, X ox. The chemical structure and elemental composition of the films were investigated by transmission infrared spectrophotometry and x-ray photoelectron spectroscopy. Optical properties-refractive index, absorption coefficient, and optical gap-were determined from transmission ultraviolet-visible spectroscopy data. The latter also allowed the determination of film thicknesses and hence deposition rates. It was found that the oxygen content of the films and, within limits, the refractive index are controllable by the selection of X ox .

We have investigated the Lz 3M4 5M4 5 Auger spectra of Ag excited with bremsstrahlung.The main experimental spectra are in good agreement with atomic-multiplet-structure calculations in which the initial state is treated in jj coupling and the final state in the intermediate coupling scheme. Anomalous loss structures appear at lower energies than those of the main spectra. These losses appear to be atomic in origin and are not manifest in the corresponding spectra of In, Sn, and Sb. We demonstrate that these losses are consistent with a model of d-band spectator vacancy shake-up satellites. Coster-Kronig processes present in Cu appear to be absent here.

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