TY - JOUR
T1 - Inhomogeneous Lineshape Profiles of C2H2 Perturbed by Xe
AU - Lance, B.
AU - Blanquet, G.
AU - Walrand, J.
AU - Populaire, Jean-Claude
AU - Bouanich, J.-P.
AU - Robert, D.
N1 - Copyright 2004 Elsevier Science B.V., Amsterdam. All rights reserved.
PY - 1999/9/1
Y1 - 1999/9/1
N2 - Several infrared transitions of the ν band of CH perturbed by Xe near 700 cm have been recorded using a tunable diode-laser spectrometer, equipped with a thermostatically regulated cell. The pressure and temperature regimes covered during the experiments are respectively ranging between 20 and 200 mbar and 170 and 350 K. The experimental profiles are accurately studied with a recently proposed lineshape model accounting for the collisional confinement narrowing of the Doppler spectral contribution, the inhomogeneous collisional broadening and shifting, and the exchange between the various speed classes of the Maxwell-Boltzmann distribution. The speed dependence of the collisional broadening is either ab initio calculated from a semiempirical potential or deduced from the experimental temperature dependence of the line broadening. It is shown that, for the considered range of temperature, this speed dependence does not significantly modify the lineshape, so that the usual hard and soft models conveniently account for most of the observed effects.
AB - Several infrared transitions of the ν band of CH perturbed by Xe near 700 cm have been recorded using a tunable diode-laser spectrometer, equipped with a thermostatically regulated cell. The pressure and temperature regimes covered during the experiments are respectively ranging between 20 and 200 mbar and 170 and 350 K. The experimental profiles are accurately studied with a recently proposed lineshape model accounting for the collisional confinement narrowing of the Doppler spectral contribution, the inhomogeneous collisional broadening and shifting, and the exchange between the various speed classes of the Maxwell-Boltzmann distribution. The speed dependence of the collisional broadening is either ab initio calculated from a semiempirical potential or deduced from the experimental temperature dependence of the line broadening. It is shown that, for the considered range of temperature, this speed dependence does not significantly modify the lineshape, so that the usual hard and soft models conveniently account for most of the observed effects.
UR - http://www.scopus.com/inward/record.url?scp=0002982640&partnerID=8YFLogxK
M3 - Article
AN - SCOPUS:0002982640
SN - 0022-2852
VL - 197
SP - 32
EP - 45
JO - Journal of molecular spectroscopy
JF - Journal of molecular spectroscopy
IS - 1
ER -