The Fourier transform absorption spectrum of acetylene between 8280 and 8700 cm−1. (July 2016)

• Record Type: Journal Article
• Authors: Lyulin, O.M.; Vander Auwera, J.; Campargue, A.
• Is Part Of: Journal of quantitative spectroscopy & radiative transfer. Volume 177(2016:Jul.)
• Page Start: 234
• Page End: 240
• Publication Date: 2016-07
• Subjects: Acetylene -- C2H2 -- Effective Hamiltonian -- FTS -- Spectroscopic database -- HITRAN; Spectrum analysis -- Periodicals; Radiation -- Periodicals; Analyse spectrale -- Périodiques; Rayonnement -- Périodiques; Radiation; Spectrum analysis; Periodicals; 543.0858
• DOI: 10.1016/j.jqsrt.2015.11.026
• Languages: English
• ISSNs: 0022-4073

Abstract

Abstract: High resolution (0.011 cm –1 ) room temperature (295 K) Fourier transform absorption spectra (FTS) of acetylene have been analyzed in the 8280–8700 cm −1 range dominated by the ν 1 + ν 2 + ν 3 band at 8512 cm −1 . Line positions and intensities were retrieved from FTS spectra recorded at 3.84 and 56.6 hPa. As a result, a list of 1001 lines was constructed with intensities ranging between about 2×10 −26 and 10 −22 cm/molecule. Comparison with accurate predictions provided by a global effective operator model led to the assignment of 629 12 C2 H2 lines. In addition, 114 lines of the 13 C 12 CH2 isotopologue were assigned using information available in the literature. The 12 C2 H2 lines belong to thirteen bands, nine of which being newly reported. The 13 C 12 CH2 lines belong to three bands, the intensities of which being reported for the first time. Spectroscopic parameters of the 12 C2 H2 upper vibrational levels were derived from band-by-band analyses of the line positions (typical rms are on the order of 0.002 cm −1 ). Three of the analyzed bands were found to be affected by rovibrational perturbations, which are discussed in the frame of a global effective Hamiltonian. The obtained line parameters are compared with those of the two bands included in the HITRAN 2012 database. Highlights: Fourier Transform Spectroscopy of acetylene between 8280 and 8700 cm −1 . Line positions, intensities of 1001 lines were derived, including 114 13 C 12 CH2 lines. Predictions of the global effective Hamiltonian were used to assign the spectrum. 629 12 C2 H2 lines rovibrationally assigned to13 bands, 9 bands being new. Comparison to the HITRAN list is discussed.