Nonadiabatic Final State Interactions in Na‐Rare Gas Optical Collisions

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Abstract
State distributions produced by simultaneous radiative and collisional processes reflect both the pertinent molecular potentials and nonadiabatic couplings among the adiabatic terms of a system. These distributions are important in many elastic and inelastic collision processes, including electronic quenching, line broadening, and radiative transfer. In this paper, physical and theoretical concepts of the optical collisions, as applied to sodium atom‐noble gas mixtures, are reviewed. Supporting data from experiments on depolarization and fine‐structure branching in atomic states produced in optical collisions is presented. Several factors responsible for the observed, strongly nonthermal fine‐structure branching, including curve crossings and molecular parity, are discussed.

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