Abstract Semiclassical formulations of collisional redistribution of polarized radiation are presented at several levels of approximation, from full classical path coupled equations to the backing/decoupling model. These are numerically tested against the results of a quantum mechanical coupled-channels formalism, by the comparison of polarization curves in both spectral wings of the Srf1 So-1 Pi) transition, with Ar and He as collisional perturbers. It is found that the locking/decoupling model can often produce good agreement with exact results if the effects due to trajectories and multiple Condon points are treated properly. Significant discrepancies due to the Condon approximation used ty the model is seen in the near blue wing of the spectra and attributed to antistatic effects. A clear analysis of these effects and the role of ambiguities introduced ty the backing/decoupling radius is possible ty a comparison with classical path methods in which the effects of radiative coupling and of rotational decoupling can be tested separately with a high degree of accuracy. © 1991 IOP Publishing Ltd.
R. J. Bieniek et al., "Collisional Redistribution Of Polarized Radiation For Sr-ar(He) Systems: A Numerical Comparison Of The Semiclassical Decoupiing/locking Model To Exact Results," Journal of Physics B: Atomic, Molecular and Optical Physics, vol. 24, no. 24, pp. 5103 - 5119, IOP Publishing, Dec 1991.
The definitive version is available at https://doi.org/10.1088/0953-4075/24/24/010
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28 Dec 1991