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|Type:||Artigo de periódico|
|Title:||Line Shape Variations Of Ag Auger Shake-up Satellites Outside The Resonance Regime|
De Siervo A.
De Castro S.G.C.
|Abstract:||In recent publications, unambiguously identified shake-up satellites have been observed in the L123M45M45 spectra of 4d metals, studied with conventional X-ray sources and, in the L3 threshold region, with synchrotron radiation. There remain questions concerning the origin of these satellites and their relation to the corresponding X-ray photoelectron spectroscopy (XPS) spectra. We report here a study of the Ag L23M45M45 spectra as a function of photon energy and demonstrate the evolution of the line shapes of the satellite spectra. The transition from the adiabatic to sudden approximation regimes appears to occur at around 80 eV above threshold, which is much less than expected for plasmon satellites. These results may reflect the influence of quasi-atomic screening, as opposed to metallic screening. The experiments were performed using the SXS-beamline at the National Synchrotron Laboratory of Brazil (LNLS). © 1999 Elsevier Science B.V. All rights reserved.|
|Appears in Collections:||Unicamp - Artigos e Outros Documentos|
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