Date of Award

Winter 1994

Project Type


Program or Major


Degree Name

Doctor of Philosophy

First Advisor

Lyman Mower


A survey of electron exchange interactions in various atomic systems at large internuclear distances is given. Polarized wave functions, obtained by solving differential equations numerically, are used in the Holstein-Herring integral for the exchange energy. The asymptotically exact exchange interaction thus obtained is subsequently used in the study of charge transfer processes that occur in the collision of atomic systems. A natural scaling law that helps to make a rapid estimation of the charge transfer cross section in an ion-ion collision from the knowledge of the isoelectronic ion-atom cross section is derived. Finally, a detailed analysis of the oscillatory structures of the charge transfer cross section curves is also discussed.