Abstract
A theory for the spectral wings of collision-induced scattered light is presented. It differs from previous theories in that realistic potentials and polarizabilities are employed. The line shape at relatively low frequencies is determined largely by the effects of distant collisions. At high frequencies it is determined primarily by the repulsive part of the interatomic potential. At intermediate frequencies it is sensitive to both the attractive part of the potential and the short-range part of the polarizability anisotropy. A tecnique in which the analytic behavior of the trajectories in the complex time plane plays a key role is employed.
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