The noble-gas atom xenon can bind fluorine atoms an form severa stable compounds.We study the electronic structure of the xenon fluorides (XeF_n,n=2,4,6) by calculating their ionization spectra using a Green's function method,which allows one to treat many-bond effects at a high level.or focus is on the valence region and on the Xe4d core hole.We observe a sensitive dependence of the spectra on the number of fluorine lignds.Systematic line shifts are uncovered and explained.In the Xe 5s an F2s inner-valence regimes,from XeF_2 to XeF_6,the usefulness of the one-particle picture of ionization is found to become progressively worse.moreover,adding the electronegative fluorine ligands seems to enhance-not suppress-the Auger decay of a Xe4d core hole.
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