WE02 15min1:42
ANALYSIS OF THE FIRST AND SECOND TRIADS OF H2S FROM 2200 TO 4100 CM-1.

L. R. BROWN, J. A. CRISP, D. CRISP, Jet Propulsion Laboratory, California Institute of Technology, 4800 Oak Grove Drive, Pasadena, California 91109; A. PERRIN, Laboratoire de Physique Moléculaire Applications CNRS, Université Pierre et Marie Curie Bte 76, 4 Place Jussieu 75252 Paris Cedex 05, France; A. D. BYKOV, O. V. NAUMENKO, M. A. SMIRNOV AND L. N. SINITSA, Institute of Atmospheric Optics, SB, Russian Academy of Science, 634055, Tomsk, Russia.

The 1800 - 5400 cm-1 region of H2S 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 [2nu2, nu1 and nu3] near 4 µm and the second triad [3nu2, nu1+nu2 and nu2+nu3] near 2.7 µm were obtained for H232S, H234S and H233S. 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 H232S up to J = 17 and Ka = 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-2/atm at 296 K of: 0.33 for 2nu2, 0.45 for nu1 and 0.12 for nu3, 0.03 for 3nu2, 1.82 for nu1+nu3 and 2.87 for nu2+nu3.
[3pt]

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.