Diode Laser Measurements of Self-Broadening Coefficients in the v5 Band of C2H2 at Low Temperature

D. Lambot, J.-C. Populaire, J. Walrand, G. Blanquet, J.P. Bouanich

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    Collisional self-broadening coefficients for 21 lines in the P and R branches of the v band of CH at low temperature (173 K) have been measured using a tunable diode laser spectrometer and a low-temperature variable path length absorption cell. These lines, with J values ranging from 1 to 25, are located in the spectral range 670-790 cm. A semiclassical line-broadening calculation provides satisfactory results when the electrostatic interactions arising from the hexadecapole moment of CH are taken into account. We have also examined the validity of a simple power law governing the temperature dependence of the broadening coefficients.
    langue originaleAnglais
    Pages (de - à)1-11
    Nombre de pages11
    journalJournal of molecular spectroscopy
    Numéro de publication1
    Les DOIs
    Etat de la publicationPublié - 1 mai 1994

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