[OPTICAL REVIEW Vol. 9, No. 2 (2002) 45-48]
Line-Mixing Calculations for the 5.3 μm NO Band
Mikihiko HIRONO
Department of Electrical and Electronic Engineering, Faculty of Engineering, Niigata University, 8050 Ikarashi 2, Niigata 950-2181, Japan
(Received September 17, 2001; Accepted January 31, 2002; Revised January 27, 2002)
Line-mixing coefficients of the NO-N2 system are calculated within the infinite-order sudden (IOS) and energy-corrected sudden (ECS) approximations. The so-called sum rule between the line width and the line-mixing coefficients is used for line-mixing calculation. Line widths calculated from the ECS model are in good agreement with experimental data for the 5.3 μm NO band. The band-correction function of NO, which characterizes the deviations from the superposition of Lorentz profiles, is also calculated. The ECS results as well as experimental data indicate strong sub-Lorentzian behavior in the wing of the R branch of the 5.3 μm NO band.
Key words: line mixing, line coupling, line shape, infrared absorption, absorption coefficient, molecular collision