This book presents a theoretical analysis of the problem of bound state continuum transitions in low energy collisions involving a negative ion. Each chapter contains a short bibliography intended to supply the reader with a basis for further reading. Contents:Ion-Atom Collisions in the Molecular RegimeContinuum States-Scattering by a PotentialCollisional Detachment in H--Rare Gas CollisionsAssociative DetachmentElectron-Molecule CollisionsDissociative Attachment and Vibrational Excitation in e--HCl Collisions and e--H2 Collisions Readership: Researchers in atomic-molecular physics.