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KLL Auger resonant Raman transition in metallic Cu and Ni

Authors
Journal
Surface Science
0039-6028
Publisher
Elsevier
Publication Date
Volume
601
Issue
4
Identifiers
DOI: 10.1016/j.susc.2006.11.059
Keywords
  • Auger Resonant Raman Transition
  • X-Ray Excited Auger Electron Spectroscopy
  • Density Functional Calculations
  • Copper
  • Nickel
Disciplines
  • Physics

Abstract

Abstract High energy resolution KL 23L 23 Auger spectra of polycrystalline Cu and Ni were measured using photon energies up to about 50 eV above the K-absorption edge and down to 5 eV (Cu KLL) and 4 eV (Ni KLL) below threshold. The spectra show strong satellite structures varying considerably as a function of the photon energy. In the sub-threshold region the linear dispersion of the diagram line energy positions and a distortion of the line shape as a function of photon energy, attributable to the Auger resonant Raman process, is clearly observed, indicating the one-step nature of the Auger emission. These changes in the resonant spectra are interpreted using a simple model based on resonant scattering theory in combination with partial density of states obtained from cluster molecular orbital (DV- Xα) calculations.

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