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Proceedings Paper

Halfwidths of H2O-N2 spectral lines of nν2 bands (n=1,...,12)
Author(s): D. S. Emelyanov; V. N. Stroinova
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Paper 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.

Paper Details

Date Published: 14 February 2008
PDF: 6 pages
Proc. SPIE 6936, Fourteenth International Symposium on Atmospheric and Ocean Optics/Atmospheric Physics, 693605 (14 February 2008); doi: 10.1117/12.783043
Show Author Affiliations
D. S. Emelyanov, Institute of Atmospheric Optics (Russia)
V. N. Stroinova, Tomsk Polytechnical Univ. (Russia)

Published in SPIE Proceedings Vol. 6936:
Fourteenth International Symposium on Atmospheric and Ocean Optics/Atmospheric Physics
Gennadii G. Matvienko; Victor A. Banakh, Editor(s)

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