Electron hole pair mediated vibrational excitation in CO scattering from Au(111): Incidence energy and surface temperature dependence
2014 | journal article. A publication of Göttingen
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Electron hole pair mediated vibrational excitation in CO scattering from Au(111): Incidence energy and surface temperature dependence
Shirhatti, P. R.; Werdecker, J.; Golibrzuch, K.; Wodtke, A. M. & Bartels, C. (2014)
The Journal of Chemical Physics, 141(12) art. 124704. DOI: https://doi.org/10.1063/1.4894814
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- Authors
- Shirhatti, Pranav R.; Werdecker, Joern; Golibrzuch, Kai; Wodtke, Alec Michael; Bartels, Christof
- Abstract
- We investigated the translational incidence energy (E-i) and surface temperature (T-s) dependence of CO vibrational excitation upon scattering from a clean Au(111) surface. We report absolute v=0 -> 1 excitation probabilities for E-i between 0.16 and 0.84 eV and T-s between 473 and 973 K. This is now only the second collision system where such comprehensive measurements are available - the first is NO on Au(111). For CO on Au(111), vibrational excitation occurs via direct inelastic scattering through electron hole pair mediated energy transfer - it is enhanced by incidence translation and the electronically non-adiabatic coupling is about 5 times weaker than in NO scattering from Au(111). Vibrational excitation via the trapping desorption channel dominates at E-i = 0.16 eV and quickly disappears at higher E-i. (C) 2014 AIP Publishing LLC.
- Issue Date
- 2014
- Status
- published
- Publisher
- Amer Inst Physics
- Journal
- The Journal of Chemical Physics
- ISSN
- 1089-7690; 0021-9606
- Sponsor
- Alexander von Humboldt Foundation