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Article Dans Une Revue Journal of Quantitative Spectroscopy and Radiative Transfer Année : 2008

Oxygen, nitrogen, and air broadening of HCN spectral lines at terahertz frequencies

Résumé

The room-temperature nitrogen- and oxygen-broadening coefficients of hydrogen cyanide spectral lines have been measured in the 0.5–3 THz (17–100 cm1) frequency range (purely rotational transitions with 5pJp36) by a continuous-wave terahertz spectrometer based on a photomixing source. An improved version of the Robert and Bonamy semiclassical formalism has been used to calculate the oxygen-broadening coefficients and resulted in a good agreement with these measurements. The nitrogen and oxygen data are combined to provide the air-broadening coefficients as used by the HITRAN database. A significant difference is observed between the measured and tabulated values for transitions with high values of the rotational quantum number. A new polynomial representation is suggested for inclusion in HITRAN. A similar polynomial expression has been derived for the nitrogen broadening to aid the studies of Titan’s atmosphere.
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Dates et versions

hal-00504805 , version 1 (21-07-2010)

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  • HAL Id : hal-00504805 , version 1

Citer

A. Cuisset, Robin Bocquet, Francis Hindle, Gaël Mouret, Jeanna Buldyreva, et al.. Oxygen, nitrogen, and air broadening of HCN spectral lines at terahertz frequencies. Journal of Quantitative Spectroscopy and Radiative Transfer, 2008, 109 (17-1), pp.2857-2868. ⟨hal-00504805⟩
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