TY - JOUR
T1 - Oxygen Broadening of Acetylene Lines in the ν5 Band at Low Temperature
AU - Bouanich, J.-P.
AU - Blanquet, G.
AU - Walrand, J.
N1 - Copyright 2004 Elsevier Science B.V., Amsterdam. All rights reserved.
PY - 1999/4/1
Y1 - 1999/4/1
N2 - O-broadening coefficients have been measured for 29 lines of CHat 173.2 K in thePandRbranches of the νband near 14 μm, using a tunable diode-laser spectrometer. The collisional widths obtained by Rautian profiles closely fitting the measured spectral shape of the lines are slightly larger than those derived from Voigt profiles. The broadening coefficients are compared with results calculated from a semiclassical theory, performed by considering, in addition to electrostatic interactions involving the hexadecapole moments of CHand O, the atom-atom Lennard-Jones model. By comparing broadening coefficients at 297 and 173.2 K from a simple power law, the temperature dependence of these broadenings has been determined both experimentally and theoretically.
AB - O-broadening coefficients have been measured for 29 lines of CHat 173.2 K in thePandRbranches of the νband near 14 μm, using a tunable diode-laser spectrometer. The collisional widths obtained by Rautian profiles closely fitting the measured spectral shape of the lines are slightly larger than those derived from Voigt profiles. The broadening coefficients are compared with results calculated from a semiclassical theory, performed by considering, in addition to electrostatic interactions involving the hexadecapole moments of CHand O, the atom-atom Lennard-Jones model. By comparing broadening coefficients at 297 and 173.2 K from a simple power law, the temperature dependence of these broadenings has been determined both experimentally and theoretically.
UR - http://www.scopus.com/inward/record.url?scp=0033114857&partnerID=8YFLogxK
U2 - 10.1006/jmsp.1999.7806
DO - 10.1006/jmsp.1999.7806
M3 - Article
AN - SCOPUS:0033114857
SN - 0022-2852
VL - 194
SP - 269
EP - 277
JO - Journal of molecular spectroscopy
JF - Journal of molecular spectroscopy
IS - 2
ER -