Semi-classical H 2 -broadening coefficients of 12 CH 3 D rovibrational lines and their temperature dependence for planetary atmosphere modeling - Archive ouverte HAL Accéder directement au contenu
Article Dans Une Revue Icarus Année : 2017

Semi-classical H 2 -broadening coefficients of 12 CH 3 D rovibrational lines and their temperature dependence for planetary atmosphere modeling

Résumé

Theoretical hydrogen-broadening coefficients and associated temperature exponents for 12CH3D (J, K) lines in parallel (ΔK = 0) bands are calculated by a semi-classical approach based on a rigorous consideration of the active molecule as a symmetric top, a model intermolecular potential comprising both short- and long-range interactions, and exact classical trajectories. The leading potential terms are shown to provide a realistic description of line broadening in comparison with scarce measurements available in the literature. The calculations performed for 296, 240 and 190 K are used to extract the line-width temperature-dependence exponents for the typical temperature range of atmospheric interest ∼200–300 K. Detailed P-Q-R-line lists are provided for large intervals of quantum numbers (0 ≤ J ≤ 20, 0 ≤ K ≤ J) requested for remote sensing of planetary atmospheres, in particular those of outer planets and their moons. With negligible vibrational dependence of CH3D line-widths and estimated as negligible their sub-branch dependence, these data can be also employed for perpendicular bands.
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Dates et versions

hal-01719290 , version 1 (28-02-2018)

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T. Sinyakova, J. Buldyreva. Semi-classical H 2 -broadening coefficients of 12 CH 3 D rovibrational lines and their temperature dependence for planetary atmosphere modeling. Icarus, 2017, 282, pp.363 - 374. ⟨10.1016/j.icarus.2016.09.034⟩. ⟨hal-01719290⟩
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