Astronomy and Astrophysics – Astrophysics
Scientific paper
Jul 1994
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1994apjs...93..351a&link_type=abstract
Astrophysical Journal Supplement Series (ISSN 0067-0049), vol. 93, no. 1, p. 351-395
Astronomy and Astrophysics
Astrophysics
51
Hydroxyl Radicals, Infrared Spectra, Molecular Excitation, Molecular Spectra, Molecular Spectroscopy, Nightglow, Fourier Transformation, Line Spectra, Rotational States, Upper Atmosphere, Vibrational States
Scientific paper
The infrared spectrum of the hydroxyl radical OH, between 1850 and 9000/cm has been measured with a Fourier transform spectrometer. The source, a hydrogen-ozone diffusion flame, was designed to study the excitation of rotation-vibration levels of the OH Meinel bands under conditions similar to those in the upper atmosphere which produce the nighttime OH airglow emission. Twenty-three bands were observed: nine bands in the Delta upsilon = 1 sequence, nine bands in the Delta upsilon = 2 sequence, and five bands in the Delta upsilon = 3 sequence. A global nonlinear least-squares fit of 1696 lines yielded molecular parameters with a standard deviation of 0.003/cm. Term values are computed, and transition frequencies in the Delta upsilon = 3, 4, 5, 6 sequences in the near-infrared are predicted.
Abrams Mark C.
Brault James W.
Davis Sumner P.
Engleman Rolf Jr.
Rao L. P. M.
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