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Infrared emissivities and absorptivities of gases

Penner, S. S. and Thomson, A. (1957) Infrared emissivities and absorptivities of gases. Journal of Applied Physics, 28 (5). pp. 614-623. ISSN 0021-8979.

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Approximate analytic expressions are obtained for the "effective band widths" and emissivities of diatomic molecules at elevated pressures. The absorptivities of molecular vibration‐rotation bands are evaluated for radiation emitted by similar molecular vibration‐rotation bands and for radiation emitted by blackbodies. The results obtained for the absorptivity calculations compare favorably with available empirical correlations for H_2O. The postulated model does not apply to CO_2 and, therefore, no satisfactory theoretical formula has been derived for the absorptivities of this molecule. The appendix (by A. Thomson) is devoted to a critical examination of the limits of validity of the effective band‐width concept for different molecules.

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Additional Information:© 1957 American Institute of Physics. Received September 18, 1956. Online Publication Date: 17 May 2004. Supported by the U. S. Office of Naval Research under Contract Nonr-220(03), NR 015401.
Group:Guggenheim Jet Propulsion Center
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Office of Naval Research (ONR)Nonr-220(03), NR 015401
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Guggenheim Jet Propulsion Center UNSPECIFIED
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Official Citation:Infrared Emissivities and Absorptivities of Gases Penner, S. S. Thomson, A. Page(s): 614 - 623 Digital Object Identifier : 10.1063/1.1722813
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:21757
Deposited By: Ruth Sustaita
Deposited On:14 Jan 2011 16:15
Last Modified:26 Dec 2012 12:50

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