Vibrational energy transfer and quenching of OH A{sup 2}{Sigma}{sup +}({nu}{prime}=1) measured at high temperatures in a shock tube

Journal Article · Thu May 25 04:00:00 EDT 1995 · Journal of Physical Chemistry

DOI:https://doi.org/10.1021/j100021a004· OSTI ID:62449

Paul, P H ^[1]

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1. Sandia National Lab., Livermore, CA (United States)

Rate coefficients are reported for vibrational energy transfer and electronic quenching of OH A{sup 2}{Sigma}{sup +}({nu}{prime}=1) by N{sub 2}, O{sub 2}, CO, CO{sub 2}, NO, Ar, Kr, and Xe. Rate coefficients for electronic quenching of OH A{sup 2}{Sigma}{sup +}({nu}{prime}=0) by the same set of collision partners are also reported. The measurements were performed at high temperatures (1900 and 2300 K) behind reproducible shock waves. The cross sections for quenching in {nu}{prime} = 1 were observed to be quite similar to the values found for quenching in {nu}{prime} = 0. For all of the species studied, the cross sections were found to be independent of temperature from 1900 to 2300 K. However, all of the high-temperature cross sections were found to be smaller than the previously reported values for quenching and vibrational energy transfer at 300 K. The decrease in the cross sections with temperature was observed to be more pronounced for vibrational energy transfer than for electronic quenching. 33 refs., 3 tabs.

• Sponsoring Organization: USDOE
• OSTI ID: 62449
• Journal Information: Journal of Physical Chemistry, Journal Name: Journal of Physical Chemistry Journal Issue: 21 Vol. 99; ISSN JPCHAX; ISSN 0022-3654
• Country of Publication: United States
• Language: English

Related Subjects

40 CHEMISTRY
66 PHYSICS
ARGON
CARBON DIOXIDE
CARBON MONOXIDE
ELECTRON-MOLECULE COLLISIONS
ENERGY TRANSFER
EXPERIMENTAL DATA
FLUORESCENCE
HYDROXYL RADICALS
KINETICS
KRYPTON
NITROGEN
NUMERICAL DATA
OXYGEN
SHOCK TUBES
VIBRATIONAL STATES
XENON