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Record 5 of 18074
IOS and ECS line coupling calculation for the CO-He system - Influence on the vibration-rotation band shapes
External Online Source: doi:10.1063/1.452988
Author and Affiliation:
Boissoles, J.(Rennes Univ., France)
Boulet, C.(Rennes I, Universite, France)
Robert, D.(Franche-Comte, Universite, Besancon, France)
Green, S.(NASA Goddard Institute for Space Studies, New York, United States)
Abstract: Line coupling coefficients resulting from rotational excitation of CO perturbed by He are computed within the infinite order sudden approximation (IOSA) and within the energy corrected sudden approximation (ECSA). The influence of this line coupling on the 1-0 CO-He vibration-rotation band shape is then computed for the case of weakly overlapping lines in the 292-78 K temperature range. The IOS and ECS results differ only at 78 K by a weak amount at high frequencies. Comparison with an additive superposition of Lorentzian lines shows strong modifications in the troughs between the lines. These calculated modifications are in excellent quantitative agreement with recent experimental data for all the temperatures considered. The applicability of previous approaches to CO-He system, based on either the strong collision model or exponential energy gap law, is also discussed.
Publication Date: Sep 15, 1987
Document ID:
(Acquired Nov 28, 1995)
Accession Number: 88A11165
Document Type: Journal Article
Publication Information: Journal of Chemical Physics; p. 3447-346; (ISSN 0021-9606); 87
Publisher Information: United States
Financial Sponsor: NASA; United States
Organization Source: Rennes Univ.; Besancon, France
Franche-Comte Univ.; New York, NY, United States
NASA Goddard Inst. for Space Studies
Description: 14p; In English
Distribution Limits: Unclassified; Publicly available; Unlimited
Rights: Copyright
Imprint And Other Notes: Journal of Chemical Physics (ISSN 0021-9606), vol. 87, Sept. 15, 1987, p. 3447-3460.
Availability Source: Other Sources
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