Collisional electronic quenching of OH {ital A} {sup 2}{Sigma} ({ital v}{prime}=0) measured at high temperature in a shock tube

Journal Article · Thu Jun 01 04:00:00 EDT 1995 · Journal of Chemical Physics

DOI:https://doi.org/10.1063/1.468829· OSTI ID:46414

Paul, P H; Durant, Jr, J L; Gray, J A ^[1]; Furlanetto, M R ^[2]

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1. Sandia National Laboratories, Livermore, California 94551 (United States)
2. Department of Chemistry, Williams College, Williamstown, Massachusetts 01267 (United States)

Rate coefficients are reported for electronic quenching of OH {ital A} {sup 2}{Sigma} {ital v}{prime}=0 by N{sub 2}, O{sub 2}, CO, CO{sub 2}, NO, Ar, Kr, and Xe measured at high temperatures behind reproducible shock waves. The cross section for quenching by Ar was found to be less than 0.06 A{sup 2}. The cross sections for quenching by N{sub 2} and Kr were found to be 0.5 and 1.0 A{sup 2}, respectively. The cross sections for the remaining species were found to be of order gas kinetic. For all of the species the cross sections were found to be very weak functions of temperature from 1900 to 2300 K. The measured cross sections are compared with previous measurements at lower temperatures. The observed variation with species and with temperature is observed to be consistent with a charge-transfer model for the process.

• OSTI ID: 46414
• Journal Information: Journal of Chemical Physics, Journal Name: Journal of Chemical Physics Journal Issue: 21 Vol. 102; ISSN JCPSA6; ISSN 0021-9606
• Country of Publication: United States
• Language: English

Related Subjects

40 CHEMISTRY
ARGON
ATOM-MOLECULE COLLISIONS
CARBON DIOXIDE
CARBON MONOXIDE
HYDROXYL RADICALS
KRYPTON
MOLECULE-MOLECULE COLLISIONS
NITRIC OXIDE
NITROGEN
OXYGEN
QUENCHING
SHOCK TUBES
XENON