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Pressure-Induced Lineshifts in the 2 ← 0 Band of CO Self-Perturbed and Perturbed by He, Kr, O2, and N2

✍ Scribed by J.-P. Bouanich; D. Bermejo; J.L. Domenech; R.Z. Martinez; J. Santos

Publisher
Elsevier Science
Year
1996
Tongue
English
Weight
296 KB
Volume
179
Category
Article
ISSN
0022-2852

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✦ Synopsis

The pressure-induced shifting coefficients for self-, He-, Kr-, O 2 -, and N 2 -broadened lines of CO in the first overtone band have been measured using a tunable difference-frequency laser spectrometer. The lineshift was directly obtained from the simultaneous record of the pressure-broadened line and the same line of pure CO at low pressure. Comparisons are made with results of theoretical calculations based on a semiclassical model and different interaction potentials. It is shown that the lineshifts mainly originate from vibrational dephasing effects. Although the finer details of the J dependence of the shifts are not accurately reproduced, their general trends are well predicted through the calculations.

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