title: Electron hole pair mediated vibrational excitation in CO scattering from Au(111): incidence energy and surface temperature dependence.
abstract: We investigated the translational incidence energy (Ei) and surface temperature (Ts) dependence of CO vibrational excitation upon scattering from a clean Au(111) surface. We report absolute v = 0 → 1 excitation probabilities for Ei between 0.16 and 0.84 eV and Ts 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 Ei = 0.16 eV and quickly disappears at higher Ei.
authors.affiliation: Institute for Physical Chemistry, Georg August University of Göttingen, 37077 Göttingen, Germany.
authors.forename: Pranav R
authors.initials: PR
authors.lastname: Shirhatti
authors.affiliation: Institute for Physical Chemistry, Georg August University of Göttingen, 37077 Göttingen, Germany.
authors.forename: Jörn
authors.initials: J
authors.lastname: Werdecker
authors.affiliation: Institute for Physical Chemistry, Georg August University of Göttingen, 37077 Göttingen, Germany.
authors.forename: Kai
authors.initials: K
authors.lastname: Golibrzuch
authors.affiliation: Institute for Physical Chemistry, Georg August University of Göttingen, 37077 Göttingen, Germany.
authors.forename: Alec M
authors.initials: AM
authors.lastname: Wodtke
authors.affiliation: Institute for Physical Chemistry, Georg August University of Göttingen, 37077 Göttingen, Germany.
authors.forename: Christof
authors.initials: C
authors.lastname: Bartels
mesh_terms: D002248:Carbon Monoxide / Q000737:chemistry*; D004583:Electrons; D004735:Energy Transfer; D009569:Nitric Oxide / Q000737:chemistry; D011336:Probability; D011868:Radioisotopes / Q000737:chemistry*; D012834:Silver / Q000737:chemistry*; D013696:Temperature; D014732:Vibration
chemical_list: D011868:Radioisotopes; D009569:Nitric Oxide; D012834:Silver; D002248:Carbon Monoxide