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Absorption Coefficient and Intermolecular Vibrations in the СО–Ar System

Absorption Coefficient and Intermolecular Vibrations in the СО–Ar System Absorption in the 1–0 band of CO broadened by Ar is examined using the asymptotic line-wing theory (ALWT). A semiclassical expression is derived for the line shape, where the motion of the centers of mass is considered classical and other variables remain quantum. The line shape parameters are fitted to reach agreement between calculated and experimental data on the absorption in the CO band wing. The classical potential parameters are found from the temperature dependence of the second virial coefficient. A qualitative agreement is found between the quantum potential parameters and intermolecular potential surfaces from quantum-chemical calculations. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Atmospheric and Oceanic Optics Springer Journals

Absorption Coefficient and Intermolecular Vibrations in the СО–Ar System

Atmospheric and Oceanic Optics , Volume 34 (4) – Jul 1, 2021

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References (28)

Publisher
Springer Journals
Copyright
Copyright © Pleiades Publishing, Ltd. 2021. ISSN 1024-8560, Atmospheric and Oceanic Optics, 2021, Vol. 34, No. 4, pp. 288–292. © Pleiades Publishing, Ltd., 2021. Russian Text © The Author(s), 2021, published in Optika Atmosfery i Okeana.
ISSN
1024-8560
eISSN
2070-0393
DOI
10.1134/s1024856021040102
Publisher site
See Article on Publisher Site

Abstract

Absorption in the 1–0 band of CO broadened by Ar is examined using the asymptotic line-wing theory (ALWT). A semiclassical expression is derived for the line shape, where the motion of the centers of mass is considered classical and other variables remain quantum. The line shape parameters are fitted to reach agreement between calculated and experimental data on the absorption in the CO band wing. The classical potential parameters are found from the temperature dependence of the second virial coefficient. A qualitative agreement is found between the quantum potential parameters and intermolecular potential surfaces from quantum-chemical calculations.

Journal

Atmospheric and Oceanic OpticsSpringer Journals

Published: Jul 1, 2021

Keywords: fundamental CO band wing; He broadening; spectral line wings; second virial coefficient; potential energy surface

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