KLL Auger resonant Raman transition in metallic Cu and Ni

• Published in: Surface science 2007-02, Vol.601 (4), p.1085-1089
• Main Authors: Kövér, L., Drube, W., Berényi, Z., Cserny, I., Medicherla, V.R.R., Ishii, T., Ikeno, H., Adachi, H.
• Format: Article
• Language: English
• Subjects: Auger resonant Raman transition; Condensed matter: electronic structure, electrical, magnetic, and optical properties; Condensed matter: structure, mechanical and thermal properties; Copper; Cross-disciplinary physics: materials science; rheology; Density functional calculations; Exact sciences and technology; Nickel; Physics; X-ray excited Auger electron spectroscopy
• ISSN: 0039-6028; 1879-2758
• DOI: 10.1016/j.susc.2006.11.059

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.