Resonant Auger spectroscopy at the shake-up thresholds as a probe of electron correlation effects in nickel

Abstract

The excitation energy dependence of the three-hole satellites in the (Formula presented) and (Formula presented) Auger spectra of nickel metal has been measured using synchrotron radiation. The satellite behavior in the nonradiative emission spectra at the (Formula presented) and (Formula presented) thresholds is compared and the influence of the Coster-Kronig channel explored. The three-hole satellite intensity at the (Formula presented) Auger emission line reveals a peak structure at 5 eV above the (Formula presented) threshold attributed to resonant processes at the (Formula presented) shake-up threshold. This is discussed in connection with the 6-eV feature in the x-ray-absorption spectrum. © 1998 The American Physical Society.