CO2-broadening coefficients in the ν4+ ν5 band of acetylene

B. Martin, J. Walrand, G. Blanquet, J.-P. Bouanich, M. Lepère

    Research output: Contribution to journalArticlepeer-review


    The CO-broadening coefficients of 24 P- and R-branch transitions in the ν + ν band of acetylene were measured at room temperature using a diode-laser spectrometer. These lines with J values up to 26, were located in the spectral range 1270 to 1400 cm . The collisional broadening coefficients were retrieved by fitting the experimental profiles to the Voigt, Rautian, and Galatry lineshape models. Two experimental values for the narrowing coefficient were determined from the spectra and compared with the theoretical narrowing coefficient. The calculations of these broadenings were also performed in the frame of a semiclassical formalism involving a simple intermolecular potential with an adjustable parameter. The theoretical results are in good agreement with the experimental results and reproduce well the J dependence of the broadening coefficients.
    Original languageEnglish
    Pages (from-to)52-57
    Number of pages6
    JournalJournal of molecular spectroscopy
    Issue number1
    Publication statusPublished - 1 Mar 2006


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