Measurements of the CO2 line parameters in the 10000–10300 cm−1 region. (December 2017)

• Record Type: Journal Article
• Authors: Solodov, A.M.; Petrova, T.M.; Solodov, A.A.; Borkov, Yu.G.; Tashkun, S.A.; Perevalov, V.I.
• Is Part Of: Journal of quantitative spectroscopy & radiative transfer. Volume 203(2017)
• Page Start: 242
• Page End: 248
• Publication Date: 2017-12
• Subjects: Carbon dioxide -- Fourier transform spectroscopy -- Infrared -- Vibration-rotation -- Line positions -- Line intensities -- Effective dipole moment parameters; Spectrum analysis -- Periodicals; Radiation -- Periodicals; Analyse spectrale -- Périodiques; Rayonnement -- Périodiques; Radiation; Spectrum analysis; Periodicals; 543.0858
• DOI: 10.1016/j.jqsrt.2017.04.012
• Languages: English
• ISSNs: 0022-4073

Abstract

Abstract: The absorption spectra of carbon dioxide have been recorded in the near infrared region from 10, 000 to 10, 300 cm -1, using the Bruker IFS 125 HR Fourier transform spectrometer and a 30 m multipass cell with the White type optical system. The spectra were recorded at a spectral resolution of 0.03 cm − 1, room temperature, a path length of 953.6 m and at two pressures of 294 and 523 mbar. The achieved sensitivity (noise equivalent absorption) at the level of k ν =1.38×10 − 10 cm −1 allowed detection of a number of new transitions with the intensity values down to 10 –29 cm/molecule at 296 K. Two bands 60014-00001 and 60015-00001 of 12 C 16 O2 were detected for the first time. The line positions and intensities of these bands were determined using the Voigt profile as a line shape. The uncertainty of the line position determination was estimated to be about 0.003 cm -1 for the unblended lines with a high value of the signal-to-noise ratio. The uncertainty of the line intensity determination varies from 4% to 40% depending on the strength of the line and the extent of the line overlapping. The measured line intensities of the 60014-00001 and 60015-00001 bands together with those published earlier for the Δ P =15 series of transitions were used to fit the effective dipole moment parameters of this series. Here P =2 V 1 + V 2 +3 V 3 is the polyad number ( V i ( i =1, 2, 3) are the harmonic oscillators quantum numbers). The fitted parameters reproduce the measured line intensities within their experimental uncertainties. Using the effective Hamiltonian parameters published earlier and the fitted effective dipole moment parameters the line positions and intensities of the 6001 i -00001 ( i =1, 2, 3, 4, 5, 6, 7) bands have been calculated. A comparison of the measured line positions and intensities to those contained in the new version (huang.seti.org ) AMES line list as well as in the High-T line list are given. Highlights: Line parameters of two CO2 bands in the 1 µm region are measured for the first time. Very good agreement between measured and H eff predicted line positions is observed. Considerable disagreement between measured, High-T and AMES line positions is found. Global modeling of the line intensities in the 1 µm region is performed. List of CO2 line parameters in the 1 µm region is prepared for HITRAN2016 database.