TY - JOUR
T1 - Hydrogen-broadening coefficients in the ν5 band of acetylene at low temperature
AU - Bouanich, J.-P.
AU - Walrand, J.
AU - Blanquet, G.
N1 - Copyright 2004 Elsevier Science B.V., Amsterdam. All rights reserved.
PY - 2002/1/1
Y1 - 2002/1/1
N2 - H-broadening coefficients have been measured for 29 lines of CH at 173.2 K in the P and R branches of the ν fundamental band near 13.7 μm, using a tunable diode-laser spectrometer. These lines were individually fitted with a Voigt and a Rautian profile in order to determine the collisional widths. The resulting broadening coefficients are compared with values calculated from a semiclassical theory performed by considering, in addition to electrostatic interactions, the atom-atom Lennard-Jones model. A satisfactory agreement is obtained but only for low and medium J values. 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 - H-broadening coefficients have been measured for 29 lines of CH at 173.2 K in the P and R branches of the ν fundamental band near 13.7 μm, using a tunable diode-laser spectrometer. These lines were individually fitted with a Voigt and a Rautian profile in order to determine the collisional widths. The resulting broadening coefficients are compared with values calculated from a semiclassical theory performed by considering, in addition to electrostatic interactions, the atom-atom Lennard-Jones model. A satisfactory agreement is obtained but only for low and medium J values. 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=0036882976&partnerID=8YFLogxK
U2 - 10.1006/jmsp.2002.8677
DO - 10.1006/jmsp.2002.8677
M3 - Article
AN - SCOPUS:0036882976
SN - 0022-2852
VL - 216
SP - 266
EP - 270
JO - Journal of molecular spectroscopy
JF - Journal of molecular spectroscopy
IS - 2
ER -