The absorption spectrum of acetylene near 1 µm (9280–10740 cm−1) (I): Line positions. (March 2018)

• Record Type: Journal Article
• Authors: Lyulin, O.M.; Béguier, S.; Hu, S.M.; Campargue, A.
• Is Part Of: Journal of quantitative spectroscopy & radiative transfer. Volume 208(2018)
• Page Start: 179
• Page End: 187
• Publication Date: 2018-03
• 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.2018.01.007
• Languages: English
• ISSNs: 0022-4073

Abstract

Highlights: Long path Fourier-transform spectroscopy of acetylene between 9280 and 10, 740 cm –1 . Thirty-three 12 C2 H2 bands assigned, twelve of them being newly reported. Spectroscopic parameters of the upper vibrational levels are derived. Rovibrational perturbations of the strong 3ν3 band are discussed. Deviations compared to the HITRAN2016 database are evidenced. Abstract: The high-resolution absorption spectrum of acetylene is studied by Fourier-transform spectroscopy (FTS) in the 9280–10740 cm –1 region dominated by the 3ν3 band near 9640 cm −1 . Line positions and intensities of 1899 12 C2 H2 and 151 12 C 13 CH2 absorption lines are retrieved from a spectrum recorded at room temperature (298.5 K) with a pressure of 87.6 hPa and a path length of 105 m. The measured 12 C2 H2 lines belong to thirty-three bands, twelve of them being newly assigned. The lines of 12 C 13 CH2 in normal abundance (2.2%) belong to seven bands. For comparison the HITRAN database in the same region includes 301 lines of four 12 C2 H2 bands. Spectroscopic parameters of the upper vibrational levels are derived from band-by-band fits of the line positions (typical rms values are on the order of 0.002 cm –1 ). The comparison to the HITRAN line list and to results obtained using the global effective operator approach reveals a number of significant deviations. The occurrence of local rovibrational perturbations affecting a number of the analyzed bands is illustrated by the case of the strong 3ν3 band. Graphical abstract: