Other
Scientific paper
Jun 1994
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1994jmosp.165..506s&link_type=abstract
Journal of Molecular Spectroscopy, Volume 165, Issue 2, p. 506-524.
Other
29
Scientific paper
Solar McMath FTS spectra, recorded with a full instrumental width of about 0.0064 cm-1, were obtained of the fundamental vibration-rotation band (υ = 1 <-- 0) of 14N16O. These spectra have been used to determine N2-induced-broadening and N2-induced-shift coefficients as well as line intensities and positions. Measurements were made from 1780 to 1952 cm-1, up to m ≍ 22.5, for the P and R branches of the 2Π1/2 and 2Π3/2 subbands and a few transitions of the Q branch. The rotationless transition moments of the two sub-bands were found to be within 1/2% of each other. The first-order Herman-Wallis intensity factor, C, measured for the first time, is in excellent agreement with theoretical predictions. The band intensity is 114.9 +/- 3.4 cm-2 atm-1 at 296 K. The v = 1 <-- 0 N2-broadened widths and N2-induced pressure shifts are, respectively, 3% different and a factor of 2 smaller than those measured by Pine et al. [J. Mol. Spectrosc.114, 132-147 ( 1985 ) ] for the v = 2 <-- 0 band. The broadening coefficients are, where comparisons can be made, a few to about twenty percent smaller and the intensities about four percent larger than results reported by Ballard et al. [J. Mol. Spectrosc.127, 70-82 (1988)]. Line positions are retrieved and calibrated to an accuracy of +/-5 × 10-5 cm-1 using the 1-0 band of CO. Comparisons of calculated positions based on the constants of Hinz et al. [J. Mol. Spectrosc.119, 120-125 ( 1986)] reveal very good agreement for the 2Π3/2 subband and a systematic divergence for the 2Π1/2 positions. The effects of hyperfine splittings are also detected for low m transitions.
Brown Raymon L.
Chackerian C.
Giver Lawrence P.
Spencer M. N.
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