Halfwidths of H2O-N2 spectral lines of n&#957;2 bands (n=1,...,12)

D. S. Emelyanov; V. N. Stroinova

doi:10.1117/12.783043

14 February 2008 Halfwidths of H₂O-N₂ spectral lines of nν₂ bands (n=1,...,12)

D. S. Emelyanov, V. N. Stroinova

Proceedings Volume 6936, Fourteenth International Symposium on Atmospheric and Ocean Optics/Atmospheric Physics; 693605 (2008) https://doi.org/10.1117/12.783043
Event: Fourteenth International Symposium on Atmospheric and Ocean Optics/Atmospheric Physics, 2007, Buryatia, Russian Federation

Abstract

Spectroscopy of the vibrationally excited water molecule gives the important information to atmospheric physics. In particular, halfwidths of H₂O-N₂ spectral lines are necessary to compute the contribution of weak lines into the atmospheric absorption function. Earlier H₂O-N₂ halfwidths for nν₂ bands (n=1,...,5) were computed and narrowing effect was found. Probably, this fact is connected with the behaviour of H₂O mean dipole moment near the barrier to linearity. This paper is devoted to the investigation of H₂O-N₂ halfwidths depending on the bending vibrational quantum number ν₂. Semiclassical impact theory is used for computations. Intermolecular potential includes the dipole-quadrupole electrostatic term and polarization (induction and dispersion) terms. Mean dipole moments computed in using variational technique are taken into account. Pade-Borel transformation is used to compute line strengths and rotational transition frequencies. Halfwidths calculational results are presented for some lines of nν₂ bands (n=1,...,12). The calculated halfwidths are compared with the measured and computed ones and the good agreement is found.

Citation Download Citation

D. S. Emelyanov and V. N. Stroinova "Halfwidths of H₂O-N₂ spectral lines of nν₂ bands (n=1,...,12)", Proc. SPIE 6936, Fourteenth International Symposium on Atmospheric and Ocean Optics/Atmospheric Physics, 693605 (14 February 2008); https://doi.org/10.1117/12.783043

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