ANALYSIS OF THE FIRST AND SECOND TRIADS OF $H_{2}S$ FROM 2200 TO $4100 CM^{-1}$
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Date
1996
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Ohio State University
Abstract
The 1800 - $5400 cm^{-1}$ region of $H_{2}S$ was recorded at $0.011 cm^{-1}$ resolution using the McMath Fourier transform spectrometer located at Kitt Peak National Observatory. The positions of the first triad [2 $v_{2}$, $v_{1}$ and $v_{3}$] near 4 $\mu$m and the second triad [3 $v_{2}, v_{3} + v_{2}$ and $v_{2}$ + $v_{3}$] near 2.7 $\mu$m were obtained for $H_{2}^{32}S$, $H_{2}^{34}S$ and $H_{2}^{33}S$. The experimental upper states were fitted to the A-reduced Watson Hamiltonian to determine precise sets of rotational constants and Fermi and Coriolis coupling parameters. Line intensities of $H_{2}^{32}S$ up to $J = 17$ and $K = 12$ were measured and modelled to $\pm$2.5% using the 564 intensities of the first triad and 526 intensities of the second triad. The coefficients of the transformed moment expansion were obtained, corresponding to band strengths in $cm^{-3}$/atm at 296 K of: 0.33 for 2 $v_{2}$, 0.45 for $v_{1}$ and 0.12 for $v_{3}$, 0.03 for 3 $v_{2}$, 1.82 for $v_{1}$ + $v_{3}$ and 2.87 for $v_{2} + v_{3}$ Part of the research reported in this paper was performed at the Jet Propulsion Laboratory, California Institute of Technology, under contract with the National Aeronautics and Space Administration
Description
Author Institution: Jet Propulsion Laboratory, California Institute of Technology; Laboratoire de Physique Moleculaire Applications CNRS, Universite Pierre et Marie; Institute of Atmospheric Optics, SB, Russian Academy of Science