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Proceedings Paper

State-to-state inelastic and reactive molecular beam scattering from surfaces
Author(s): Keith R. Lykke; Bruce D. Kay
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Paper Abstract

Resonantly enhanced multiphoton ionization (REMPI) laser spectroscopic and molecular beam-surface scattering techniques are coupled to study inelastic and reactive gas-surface scattering with state-to-state specificity. Rotational, vibrational, translational and ang ular distributions have been measured for the inelastic scattering of HCI and N2 from Au(1 1 1 ). In both cases the scattering is direct-inelastic in nature and exhibits interesting dynamical features such as rotational rainbow scattering. In an effort to elucidate the dynamics of chemical reactions occurring on surfaces we have extended our quantum-resolved scattering studies to include the reactive scattering of a beam of gas phase H-atoms from a chlorinated metal surface M-Cl. The nascent rotational and vibrational distributions of the HCI product are determined using REMPI. The thermochemistry for this reaction on Au indicates that the product formation proceeding through chemisorbed H-atoms is slightly endothermic while direct reaction of a gas phase H-atom with M-Cl is highly exothermic (ca. 50 kcal/mole). Details of the experimental techniques, results and implications regarding the scattering dynamics are discussed.

Paper Details

Date Published: 1 July 1990
PDF: 12 pages
Proc. SPIE 1208, Laser Photoionization and Desorption Surface Analysis Techniques, (1 July 1990); doi: 10.1117/12.17866
Show Author Affiliations
Keith R. Lykke, Sandia National Labs. (United States)
Bruce D. Kay, Sandia National Labs. (United States)

Published in SPIE Proceedings Vol. 1208:
Laser Photoionization and Desorption Surface Analysis Techniques
Nicholas S. Nogar, Editor(s)

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