Absolute rovibrational intensities of 12C16O2 absorption bands in the 3090-3850 cm-1 spectral region.

Details Absolute rovibrational intensities of 12C16O2 absorption bands in the 3090-3850 cm-1 spectral region. Absolute rovibrational intensities of 12C16O2 absorption bands in the 3090-3850 cm-1 spectral region.

Nov 1998

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1998jqsrt..60..741d&link_type=abstract

Journal of Quantitative Spectroscopy and Radiative Transfer, vol. 60, issue 5, pp. 741-770

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10

Carbon Dioxide: Laboratory Spectra, Carbon Dioxide: Infrared Spectra, Carbon Dioxide: Absorption Spectra

Scientific paper

A multispectrum nonlinear least-squares fitting technique has been used to determine the absolute intensities for approximately 1500 spectral lines in 36 vibration-rotation bands of 12C16O2 between 3090 and 3850 cm-1. A total of six absorption spectra of a high-purity (99.995% minimum) natural sample of carbon dioxide were used in the analysis. The spectral data (0.01 cm-1 resolution) were recorded at room temperature and low pressure (1 to 10 Torr) using the McMath-Pierce Fourier transform spectrometer of the National Solar Observatory (NSO) on Kitt Peak. The absorption path lengths for these spectra varied between 24.86 and 385.76 m. The first experimental determination of the intensity of the theoretically predicted 2v22+ν3 "forbidden" band has been made. The measured line intensities obtained for each band have been analyzed to determine the vibrational band intensity, Sv, in cm-1/(molecule cm-2) at 296 K, square of the rotationless transition dipole moment |R|2 in Debye2, as well as the nonrigid rotor coefficients. The results are compared to the values listed in the 1996 HITRAN database which are obtained using the direct numerical diagonalization (DND) technique as well as to other published values where available.

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