Semi-classical calculations of self-broadening coefficients of OCS and HCN at temperatures between 200 K and 298 K.
For some temperatures of atmospheric interest from 200 to 298 K, the self-broadening coefficients of OCS-OCS and HCN-HCN collisional systems, at different strengths of electrostatic interactions, were calculated respectively for ν1and ν2bands for a wide range of rotational quantum numbers J. In particular, we have considered some lines that were not studied previously. We have employed the approximation of bi-resonance functions (Starikov, 2012) in the frame of the semiclassical model of Robert and Bonamy with exact trajectory (RBE). The calculated results are found to be fully consistent with the available experimental values of self-broadening coefficients of OCS and HCN. A comparative study shows that the RBE calculations reproduce the dependence of broadening coefficients on quantum number J much better than the simpler Robert and Bonamy model with parabolic trajectory (RB) for all considered temperatures.
Laboratoire de Dynamique Moléculaire et Matériaux Photoniques, Université de Tunis, Ecole Nationale Supérieure d'Ingénieurs de Tunis, 5 Av. Taha Hussein, Tunis, Tunisia.
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Jellali
Laboratoire de Dynamique Moléculaire et Matériaux Photoniques, Université de Tunis, Ecole Nationale Supérieure d'Ingénieurs de Tunis, 5 Av. Taha Hussein, Tunis, Tunisia.
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Galalou
Laboratoire de Physico-Chimie de l'Atmosphère EA 4493, Univ. Littoral Côte d'Opale, 59140 Dunkerque, France; Université de Lille, F-59000 Lille, France.
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Cuisset
Laboratoire de Dynamique Moléculaire et Matériaux Photoniques, Université de Tunis, Ecole Nationale Supérieure d'Ingénieurs de Tunis, 5 Av. Taha Hussein, Tunis, Tunisia.
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Dhib
Laboratoire de Dynamique Moléculaire et Matériaux Photoniques, Université de Tunis, Ecole Nationale Supérieure d'Ingénieurs de Tunis, 5 Av. Taha Hussein, Tunis, Tunisia.
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Aroui
Carbonyl sulfide; Exact trajectory; Hydrogen cyanide; Self-broadening coefficients; Semiclassical calculations