title: On a singularity-free pair-polarizability anisotropy model for atomic gases.
abstract: We present a collision-induced light scattering spectrum of Ne(2) and analyze it, together with an induced spectrum of Ar(2), in terms of a model for the pair-polarizability anisotropy beta of an atomic gas. This model, which is in essence a slight modification of one introduced by Ceccherini et al. [J. Chem. Phys. 111, 6316 (1999)], is shown to describe the measured spectra much farther into the wings than does the original model. The agreement of our measurements with quantum-mechanical spectra from the most reliable, now available, ab initio computation methods for beta produces evidence in support of the data and counters criticism of our experiment.
authors.affiliation: Laboratoire des Propriétés Optiques des Matériaux et Applications, UMR CNRS 6136, Université d'Angers, 2 Boulevard Lavoisier, 49045 Angers, France. michel.chrysos@univ-angers.fr
authors.forename: M
authors.initials: M
authors.lastname: Chrysos
authors.forename: S
authors.initials: S
authors.lastname: Dixneuf
authors.forename: F
authors.initials: F
authors.lastname: Rachet