Inclusion of ion dynamics in the unified classical path theory of Stark broadening

A theory of Stark broadening of hydrogenic radiators which adds ion dynamic corrections to the unified theory of Smith, Cooper, and Vidal is presented. The dynamic parts of the ion collisions are treated in an impactlike approximation, which is justified for certain plasma conditions by the static-ion field cutoff in the ion interaction integrals. Approximate results are presented for the Lyman-$\alpha$, Lyman-$\beta$, and H-$\alpha$ lines of hydrogen, and comparison is made to experiment and to other theories.