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Experimental Evidence for Anomalous Population Temperatures of OH in Flames

Penner, S. S. (1952) Experimental Evidence for Anomalous Population Temperatures of OH in Flames. Journal of Chemical Physics, 20 (8). pp. 1334-1335. ISSN 0021-9606.

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It is the purpose of this note to present an evaluation of the experimental evidence for and against "anomalous" temperatures of OH in flames. Experimental studies have been carried out on low pressure flames, and on flames burning at atmospheric pressure. The results have usually been interpreted by using relations which are applicable only to isothermal systems. Attempts to correct for self-absorption have been made by using isointensity methods. For spectral lines with Doppler contour it has been demonstrated by quantitative calculations that the isointensity methods do not correct for self-absorption unless self-absorption is weak. In particular, Shuler's method, without allowance for the effect of frequency on intensity, has been shown to yield nonlinear plots for strong self-absorption and to be inferior to conventional procedures in the absence of self-absorption. Extensive studies on the effect of self-absorption in falsifying experimental data have been carried out by Cowan and Dieke. We have recently attempted to estimate absolute emission intensities for OH in low pressure flames by using data obtained by Oldenberg and Rieke.

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Additional Information:Reprinted from The Journal of Chemical Physics, Vol. 20, No. 8, 1334-1335, August, 1952. Copyright © 1952 American Institute of Physics. Received June 3, 1952. Supported by the ONR under Contract Nonr-220(03), NR 015210.
Group:Guggenheim Jet Propulsion Center
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Office of Naval ResearchNonr-220(03), NR 015210
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Guggenheim Jet Propulsion Center25
Record Number:CaltechAUTHORS:20091211-093848025
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Official Citation:Experimental Evidence for Anomalous Population Temperatures of OH in Flames S. S. Penner, J. Chem. Phys. 20, 1334 (1952), DOI:10.1063/1.1700748
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:16956
Deposited By: George Porter
Deposited On:15 Dec 2009 17:27
Last Modified:26 Dec 2012 11:38

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