Franck–Condon breakdown in core-level photoelectron spectroscopy of chemisorbed CO

Autor:	M. Stichler, W. Wurth, C. Keller, J. Hasselström, Anders Nilsson, Clemens Heske, Alexander Föhlisch, Nils Mårtensson, Dietrich Menzel, P Väterlein, Olof Karis
Rok vydání:	1999
Předmět:	Shape resonance X-ray photoelectron spectroscopy Chemistry Ionization Excited state General Physics and Astronomy Electronic structure Photoionization Physical and Theoretical Chemistry Photon energy Atomic physics Spectral line
Zdroj:	Chemical Physics Letters. 315:194-200
ISSN:	0009-2614
Popis:	The photon energy dependence of the vibrational fine structure in the C1s and O1s X-ray photoelectron main lines of chemisorbed CO on Ni(100) and Ru(0001) has been measured from 6 to 150 eV above the core-level thresholds. Significant deviations from the behavior in gas-phase CO are found. A strong dominance of the adiabatic peak towards threshold is found for the C1s, but not the O1s, lines. In the C1s lines, we observe a broad maximum of vibrational excitation 5 eV above the shape resonance. At high photon energies, Franck–Condon behavior is observed in both the C1s and O1s lines. This behavior is discussed in terms of the adsorbate electronic structure and the dynamic metallic screening upon core ionization.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::a42c6dc04663fd73802ce2fbe6c28bb0 https://doi.org/10.1016/s0009-2614(99)01194-x Zobrazit plný text záznamu Full Text from ScienceDirect