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Atmospheric and Oceanic Optics

2020 year, number 9

Absorption coefficient in the wing of 1-0 CO band broadened by He

O.B. Rodimova
V.E. Zuev Institute of Atmospheric Optics of Siberian Branch of the Russian Academy of Science, 1, Academician Zuev square, Tomsk, 634055, Russia
Keywords: крыло фундаментальной полосы СО, уширение гелием, крылья спектральных линий, второй вириальный коэффициент, the fundamental CO band wing, the He broadening, spectral line wings, second virial coefficient


Absorption in the 1-0 CO band wing broadened by He at different temperatures is regarded within the asymptotic line wing theory. It presents absorption as a sum of the absorption coefficients of individual line with a special shape at far distances from the line center. The line shape parameters pertaining to quantum and classical interaction potentials are found as a result of fitting to the experimental absorption data in the 1-0 CO band wing and the temperature dependence of the second virial coefficient.