ELECTRONIC EXCHANGE EFFECTS IN P+NE AND P+AR COLLISIONS

Total cross sections for net electron loss and ionization in p + Ne an d p + Ar collisions are presented with emphasis on their crucial depen dence on the quality of the static atomic exchange potential. In order to investigate these electronic exchange effects from different viewp oints, we have applied two theoretical models within an effective one particle picture, the continuum distorted wave with eikonal initial st ate approximation and a coupled-channel approach based on an optimized set of pseudostates.