CO (a(3) Pi) quenching at a metal surface: Evidence of an electron transfer mediated mechanism
2014 | journal article. A publication of Göttingen
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CO (a(3) Pi) quenching at a metal surface: Evidence of an electron transfer mediated mechanism
Graetz, F.; Engelhart, D. P.; Wagner, R. J. V.; Meijer, G.; Wodtke, A. M. & Schaefer, T. (2014)
The Journal of Chemical Physics, 141(4) art. 044712. DOI: https://doi.org/10.1063/1.4887777
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Details
- Authors
- Graetz, Fabian; Engelhart, Daniel P.; Wagner, Roman J. V.; Meijer, Gerard; Wodtke, Alec Michael; Schaefer, Tim
- Abstract
- We observe a strong influence of molecular vibration and surface temperature on electron emission promoted by the de-excitation of metastable CO(a(3) Pi) on a clean Au(111) surface using a molecular beam surface scattering apparatus. The de-excitation is independent of incidence translational energy. These observations appear incompatible with existing theories of metastable particle de-excitation on metal surfaces, which are based on the Auger effect. Instead, they strongly suggest a mechanism involving formation of a transient anion whose lifetime is similar to the vibrational period of the CO molecule. (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
