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Proceedings Paper

Velocity and angular distributions of H2 (v=1, J=1) scattered from Cu (110) and Cu (111)
Author(s): M. Gostein; Greg O. Sitz
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Paper Abstract

The scattering of vibrationally and rotationally state-selected H2 from Cu(110) and Cu(111) surfaces has been studied. Stimulated Raman scattering is used to pump a fraction of the incident flux in a supersonic beam of H2 into the J equals 1 rotational state of the first excited vibrational state. Resonance-enhanced multiphoton ionization (REMPI) is used to detect incident and scattered H2 in this state. Time-of-flight spectra are recorded as a function of the distance from the REMPI probe to the surface and scattering angle. These data are fit to a model whose parameters describe the velocity and angular distribution of the scattered molecules. The model permits a determination of flux from the density-sensitive measurements. Its use to derive a quantitative estimate of the absolute survival probability for the pumped state is discussed.

Paper Details

Date Published: 18 September 1995
PDF: 10 pages
Proc. SPIE 2548, Laser Techniques for State-Selected and State-to-State Chemistry III, (18 September 1995); doi: 10.1117/12.220852
Show Author Affiliations
M. Gostein, Univ. of Texas/Austin (United States)
Greg O. Sitz, Univ. of Texas/Austin (United States)

Published in SPIE Proceedings Vol. 2548:
Laser Techniques for State-Selected and State-to-State Chemistry III
John W. Hepburn, Editor(s)

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