J. Boissoles et al., LINE MIXING EFFECTS IN THE 00-DEGREES-3-00-DEGREES-0 BAND OF CO2 IN HELIUM .2. THEORETICAL-ANALYSIS, The Journal of chemical physics, 100(1), 1994, pp. 215-223
In paper I of this series, important deviations from an additive super
position of Lorentzian profiles were experimentally evidenced in the 0
0-degrees-3-00-degrees-0 band of CO2 in He. All the observed deviation
s are explained by the collision-induced line mixing effects which sch
ematically transfer intensity from the wing of the band to its central
part. The IOS approximation has been found to be insufficient while,
the ECS approximation leads to theoretical predictions in good agreeme
nt with the experimental data over extended ranges of frequency and pe
rturber pressure. However it must be emphasized that it has been neces
sary to resort to the method in current use for the determination of t
he fundamental rates, an ad hoc adjustement starting from the observed
linewidths.