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Rovibrational line-shape parameters for H2 in He and new H2-He potential energy surface

Abstract : We report a new H2-He potential energy surface that, with respect to the previous one [Bakr et al.(2013)], covers much larger range of H2 stretching and exhibits more accurate asymptotic behavior for large separations between H2 and He. Close-coupling calculations performed on this improved potential energy surface allow us to provide line shape parameters for H2 between 5 and 2000 K for Raman isotropic Q lines and anisotropic Q lines (or electric quadrupole lines) and for vibrational bands from the ground up to v=5 and rotational quantum numbers up to j=5. The parameters provided include the usual pressure -broadening and -shifting coefficients as well as the real and imaginary part of Dicke contribution to the Hess profile. The latter parameters can be readily implemented in other line-shape profiles like the most recent one of Hartmann and Tran.
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https://hal-univ-rennes1.archives-ouvertes.fr/hal-01580441
Contributor : Laurent Jonchère <>
Submitted on : Friday, September 1, 2017 - 3:24:49 PM
Last modification on : Monday, March 2, 2020 - 4:11:30 PM

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Franck Thibault, Konrad Patkowski, Piotr S. Żuchowski, Hubert Jóźwiak, Roman Ciuryło, et al.. Rovibrational line-shape parameters for H2 in He and new H2-He potential energy surface. Journal of Quantitative Spectroscopy and Radiative Transfer, Elsevier, 2017, 202, pp.308-320. ⟨10.1016/j.jqsrt.2017.08.014⟩. ⟨hal-01580441⟩

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