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  Observation of translation-to-vibration excitation in acetylene scattering from Au(111): A REMPI based approach.

Golibrzuch, K., Baraban, J. H., Shirhatti, P. R., Werdecker, J., Bartels, C., & Wodtke, A. M. (2015). Observation of translation-to-vibration excitation in acetylene scattering from Au(111): A REMPI based approach. Zeitschrift für Pysikalische Chemie, 229(10-12), 1929-1949. doi:10.1515/zpch-2015-0606.

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Item Permalink: http://hdl.handle.net/11858/00-001M-0000-0029-1CCA-7 Version Permalink: http://hdl.handle.net/11858/00-001M-0000-002A-109A-8
Genre: Journal Article

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 Creators:
Golibrzuch, K.1, Author              
Baraban, J. H., Author
Shirhatti, P. R.1, Author              
Werdecker, J.1, Author              
Bartels, C.1, Author              
Wodtke, A. M.1, Author              
Affiliations:
1Department of Dynamics at Surfaces, MPI for biophysical chemistry, Max Planck Society, ou_578600              

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Free keywords: Molecule-surface scattering
 Abstract: We present quantum-state and velocity resolved experiments for molecular beam scattering of acetylene (C2H2) from a single-crystal Au(111) surface, observations that reveal translational, rotational and vibrational inelasticity. The experiments are made possible by a novel (1 + 2) REMPI scheme for acetylene. The scattered molecules' velocity distributions as well as their ro-vibrational quantum-state distributions depend on the translational energy of incidence, EI, providing unambiguous evidence that the scattered molecules were not trapped and equilibrated on the surface. We report the EI-dependence of the collisional excitation of one and two quanta of the trans-bending vibrational mode, ν4 = 0 → 1, 2, which is consistent with a mechanism involving conversion of incidence translational energy to acetylene vibration. Rotationally resolved velocity measurements on scattered acetylene in its ground vibrational state are interpreted in terms of orientation-dependent rotational and vibrational excitation probabilities.

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Language(s): eng - English
 Dates: 2015-07-032015-10
 Publication Status: Published in print
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 Rev. Method: Peer
 Identifiers: DOI: 10.1515/zpch-2015-0606
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Title: Zeitschrift für Pysikalische Chemie
Source Genre: Journal
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Pages: - Volume / Issue: 229 (10-12) Sequence Number: - Start / End Page: 1929 - 1949 Identifier: -