Calculation of the absorption coefficient of the Ar-broadened CO2 in the 4.3 mm band wing on the basis of the asymptotic line wing theory
O.B. Rodimova
V.E. Zuev Institute of Atmospheric Optics of Siberian Branch of the Russian Academy of Science, Tomsk, Russia
Keywords: carbon dioxide, the Ar broadening, spectral line wings, second virial coefficient
Abstract
Carbon dioxide absorption broadened by argon is studied on the basis of the asymptotic line wing theory. The line shape parameters concerned with the classical potential governing the center-of-mass motion and the quantum intermolecular interaction potential are found. The temperature dependence of the CO2-Ar absorption beyond the 4.3 mm band edge is explained through changes in the classical potential describing the temperature behavior of the second virial coefficient in the temperature region under study.
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