A detailed analysis of vibrational excitations in x-ray photoelectron spectra of adsorbed small hydrocarbons
作者： H.-P. Steinrück , T. Fuhrmann , C. Papp , B. Tränkenschuh , R. Denecke
DOI: 10.1063/1.2397678
关键词: Adiabatic process 、 Binding energy 、 Potential energy 、 Acetylene 、 Ionization 、 Spectral line 、 Reaction intermediate 、 Excited state 、 Analytical chemistry 、 Chemistry
摘要: The vibrational fine structure of x-ray photoelectron (XP) spectra a number different small hydrocarbon molecules and reaction intermediates adsorbed on Pt(111) Ni(111) has been investigated in detail. data for methyl, methylidyne, acetylene, ethylene can consistently be analyzed within the linear coupling model. S factor, i.e., intensity ratio first vibrationally excited to adiabatic transition, is obtained 0.17±0.02 per C–H bond; deuterated species value 0.23±0.02 obtained. Therefore, used fingerprinting analysis XP identifying unknown intermediates. From data, Δr, change minimum potential energy curve upon core ionization, calculated model using order correction. For all adsorbates, including ones, Δr=0.060±0.004A Furthermore, from binding peak...
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