# INVESTIGATION OF THE $\nu_{1}$ and $2\nu_{2}$ bands of $^{14}NH_{3}$

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 Title: INVESTIGATION OF THE $\nu_{1}$ and $2\nu_{2}$ bands of $^{14}NH_{3}$ Creators: Cottaz, C.; Legay, N.; Tarrago, G.; Brown, L. R.; Margolis, J. S.; Pickett, H. M.; Poynter, R. L. Issue Date: 1998 Publisher: Ohio State University Abstract: The line positions and intensities of ammonia are being measured and analyzed between 1200 and $2100 cm^{-1}$ in order to improve the molecular database in planetary applications. For this laboratory spectra are being obtained at $0.005 cm^{-1}$ resolution using the Fourier transform spectrometers located at Orsay and at Kitt Peak National Observatory in Arizona. The observed data contain transitions of the $\nu_{4}$ fundamental band near 1626.3 and $1627.4 cm^{-1}$ (for s and a inversion states respectively) and the $2\nu_{2}$ overtone band near 1597.5 and $1882.1 cm^{-1}$ (for s and a inversion states respectively). These measurements are being modelled using the theoretical approach applied previsously to $3\nu_{2}$ and $\nu_{2}+\nu_{4}$ bands of $^{14}NH_{3}$ in the 4 micron $region^{a}$. Preliminary results will be shown. Part of this research reported in this paper are perfomed at the Jet Propulsion Laboratory, California Institute of Technology, under contract with the National Aeronautics and Space Administration. Description: $^{a}$ ***. Kleiner, G. Tarrago and L.R. Brown, J. Mol. Spectrosc., 173, 120 (1995) Author Institution: Laboratoire de Photophysique Mol\'{e}culaire, Universit\'{e} Paris Sud; Laboratoire de Physique Mol\'{e}culaire et Applications, Universit\'{e} Paris Sud; Jet Propulsion Laboratory, California Institute of Technology URI: http://hdl.handle.net/1811/19139 Other Identifiers: 1998-WF-07