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Ab initio calculations of collisional line–shape parameters and generalized spectroscopic cross-sections for rovibrational dipole lines in HD perturbed by He

Abstract : We report ab initio calculations of generalized spectroscopic cross-sections for hydrogen deuteride perturbed by helium. From these calculations, collisional line-shape parameters are deduced for the HD electric dipole transitions from R(0) to R(5) and from P(1) to P(6) in the 0–0 to 5–0 bands. These parameters are necessary for a proper interpretation of HD spectra from the atmospheres of gas giants. We demonstrate that the centrifugal distortion cannot be ignored, not only for pure rotational lines but also for rovibrational lines when one aims at sub–percent accuracy of the collisional line–shape parameters.
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https://hal.archives-ouvertes.fr/hal-02931935
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Submitted on : Thursday, September 10, 2020 - 3:31:28 PM
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K. Stankiewicz, Hubert Jóźwiak, M. Gancewski, N. Stolarczyk, Franck Thibault, et al.. Ab initio calculations of collisional line–shape parameters and generalized spectroscopic cross-sections for rovibrational dipole lines in HD perturbed by He. Journal of Quantitative Spectroscopy and Radiative Transfer, Elsevier, 2020, 254, pp.107194. ⟨10.1016/j.jqsrt.2020.107194⟩. ⟨hal-02931935⟩

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