Velocity and angular distributions of H2 (v=1, J=1) scattered from Cu (110) and Cu (111)

M. Gostein; Greg O. Sitz

doi:10.1117/12.220852

18 September 1995 Velocity and angular distributions of H2 (v=1, J=1) scattered from Cu (110) and Cu (111)

M. Gostein, Greg O. Sitz

Proceedings Volume 2548, Laser Techniques for State-Selected and State-to-State Chemistry III; (1995) https://doi.org/10.1117/12.220852
Event: SPIE's 1995 International Symposium on Optical Science, Engineering, and Instrumentation, 1995, San Diego, CA, United States

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.

Citation Download Citation

M. Gostein and Greg O. Sitz "Velocity and angular distributions of H2 (v=1, J=1) scattered from Cu (110) and Cu (111)", Proc. SPIE 2548, Laser Techniques for State-Selected and State-to-State Chemistry III, (18 September 1995); https://doi.org/10.1117/12.220852

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