Resonant Auger spectroscopy at the L2,3 shake-up thresholds as a probe   of electron correlation effects in nickel
  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. 
M. Magnuson, N. Wassdahl, A. Nilsson, A. F\"ohlisch, J. Nordgren and   N. M{\aa}rtensson
cond-mat.mtrl-sci cond-mat.str-el physics.atom-ph physics.comp-ph