A time domain photoacoustic study of the collisional relaxation of vibrationally excited H2

Thomas G. Kreutz, Jack Gelfand, Richard B. Miles, Herschel Rabitz

Research output: Contribution to journalArticlepeer-review

30 Scopus citations

Abstract

We report the first direct measurement of the vibration-to-vibration (V-V) and vibration-to-translation (V-T) rates for vibrational relaxation out of the ν=2 vibrational level in hydrogen gas. Time domain photoacoustic spectroscopy was used to monitor the collision dynamics after excitation into ν=2 through overtone stimulated Raman pumping. The V-V relaxation rate is found to be (1-4) × 10-14 cm3 s-1 molecule-1 and the V-T rate constant is (0.6-2) × 10-15 cm3 s-1 molecule-1 for normal hydrogen at 298 K.

Original languageEnglish (US)
Pages (from-to)359-369
Number of pages11
JournalChemical Physics
Volume124
Issue number3
DOIs
StatePublished - Sep 1 1988

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy(all)
  • Physical and Theoretical Chemistry

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