Atomic orbital expansion description for slow ion-atom collisions: a curved-line trajectory study

Recent progress in the description of electron processes in slow ion-atom collisions with atomic expansion models has stimulated interest in trajectory effects in those studies. The author discusses a reformulation of the atomic expansion method, explicitly taking into account curved-line internuclear trajectories. As a first application, total charge transfer cross sections in C 6+ +H collisions for energies E=0.1-1.0 keV amu -1 are found to be considerably reduced in curved-line trajectory calculations from those derived with straight-line trajectories.