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High resolution x-ray absorption spectroscopy of linear hydrocarbons adsorbed on noble metal surfaces (1992)

Rabus, H. ; Arvanitis, D. ; Domke, M. ; [weitere]

College Park, Md. : American Institute of Physics (AIP)

The Journal of Chemical Physics 96 (1992), S. 1560-1573

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Details

ISSN: 1089-7690

Quelle: AIP Digital Archive

Thema: Physik , Chemie und Pharmazie

Notizen: Recent progress in the performance of soft x-ray monochromators has revealed new features in soft x-ray molecular photoabsorption spectra. We present here a comprehensive high resolution x-ray absorption study on the linear hydrocarbons C2H2n and C2D2n, adsorbed on Ag(100) and Cu(100) at 50 K and in the solid and the gas phase. A line shape analysis is given, for the bound as well as for the continuum resonances and the absorption thresholds, by means of models easily accessible to the experimentalist, leading to a quantitative understanding of the observed spectra, including the vibrational envelopes. Changes in intramolecular bond lengths upon core-hole excitation can be determined and tracked as a function of deuteration and chemisorption. The effects of the substrate bonding on the vibrational envelopes are analyzed.

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1063/1.462140

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