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

✍ Scribed by D. Lambot; J.C. Populaire; J. Walrand; G. Blanquet; J.P. Bouanich

Publisher
Elsevier Science
Year
1994
Tongue
English
Weight
450 KB
Volume
165
Category
Article
ISSN
0022-2852

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✦ Synopsis

Collisional self-broadening coefficients for 21 lines in the (P) and (R) branches of the (v_{5}) band of (\mathrm{C}{2} \mathrm{H}{2}) at low temperature ( (173 \mathrm{~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 I to 25 , are located in the spectral range (670-790 \mathrm{~cm}^{-1}). A semiclassical line-broadening calculation provides satisfactory results when the electrostatic interactions arising from the hexadecapole moment of (\mathrm{C}{2} \mathrm{H}{2}) are taken into account. We have also examined the validity of a simple power law governing the temperature dependence of the broadening coefficients. 11994 Academic Press. Inc.

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