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KLL Auger resonant Raman transition in metallic Cu and Ni |
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| Authors: | L Kövér Z Berényi VRR Medicherla H Ikeno |
| Institution: | a Institute of Nuclear Research of the Hungarian Academy of Sciences, P.O. Box 51, H-4001 Debrecen, Hungary b Deutsches Elektronen-Synchrotron DESY, Notkestraße 85, D-22603 Hamburg, Germany c Institut für Laser-Physik, Univ. Hamburg, Luruper Chausse 149, D-22761 Hamburg, Germany d Department of Materials Science and Engineering, Kyoto University, Sakyo, Kyoto 606-8501, Japan |
| Abstract: | High energy resolution KL23L23 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. |
| Keywords: | Auger resonant Raman transition X-ray excited Auger electron spectroscopy Density functional calculations Copper Nickel |
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