Collisional redistribution of radiation in strong fields - Modification of the collision dynamics

The theory of light scattering from an atom undergoing collisions is extended to the case of strong laser fields. In particular, the conditions necessary to relate the observable quantities to intense-field collisional rate constants in a dressed-state basis are considered. It is shown that by studying the spectrum emitted by the atoms in the presence of a strong field one may measure the collisional rates for transfer between the dressed states of atom plus radiation field.