The velocity dependence of the rate constant for free-ion production via the Rydberg electron-transfer reaction K(np)+SF6 K++SF6-* has been investigated at intermediate n. The data provide evidence of a postattachment interaction between the product ions in which internal energy from the SF6-* ion is converted into translational energy. A similar conclusion is reached from measurements of the velocity and angular distributions of the product K+ ions. © 1992 The American Physical Society.
