Resonant Auger spectroscopy at the L2,3 shake-up thresholds as a probe of electron correlation effects in nickel

TL;DR

This study investigates how electron correlation effects in nickel influence Auger spectra near L2,3 shake-up thresholds, revealing resonant processes and satellite behavior linked to shake-up phenomena and Coster-Kronig channels.

Contribution

It provides new insights into the excitation energy dependence of three-hole satellites in nickel's Auger spectra and explores the influence of Coster-Kronig channels on these features.

Findings

Satellite intensity peaks at 5 eV above L3 threshold

Resonant processes at the 2p53d9 shake-up threshold identified

Influence of Coster-Kronig channel on satellite behavior analyzed

Abstract

The excitation energy dependence of the three-hole satellites in the L3-M4,5M4,5 and L2-M4,5M4,5 Auger spectra of nickel metal has been measured using synchrotron radiation. The satellite behavior in the non-radiative emission spectra at the L3 and L2 thresholds is compared and the influence of the Coster-Kronig channel explored. The three-hole satellite intensity at the L3 Auger emission line reveals a peak structure at 5 eV above the L3 threshold attributed to resonant processes at the 2p53d9 shake-up threshold. This is discussed in connection with the 6-eV feature in the x-ray absorption spectrum.