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Atmospheric and Oceanic Optics

2015 year, number 8

Averaged energy difference method of calculation of asymmetric top line broadening

A.S. Dudaryonok1, N.N. Lavrentieva1, Q. Ma2
1V.E. Zuev Institute of Atmospheric Optics of Siberian Branch of the Russian Academy of Science, 1, Academician Zuev square, Tomsk, 634021, Russia
2NASA Goddard Institute for Space Studies, 10025, New York, Broadway, 2880, USA
Keywords: метод средних частот, столкновительный переход, коэффициент уширения линии, the averaged energy difference method, collisional transition, line broadening coefficient


The new method of calculation of rotation-vibration line broadening of asymmetric tops is proposed. The application of this method allows one to obtain the linewidths having been based on some empirical data without complicated calculations. Using experimental data a vibrational dependence of averaged energy difference is deduced. The approach was used for calculation of H 2O and HDO lines broadening. Comparisons of the theoretical line shape parameters with the experimental values in different absorption bands are made.