Front Cover; Advances in Atomic, Molecular, and Optical Physics, Volume 26; Copyright Page; Contents; Contributors; Chapter 1. Comparisons of Positron and Electron Scattering By Gases; I. Introduction; II. Positron and Electron Scattering by Atoms; III. Positron and Electron Scattering by Molecules; IV. Summary and Concluding Remarks; Acknowledgements; References; Chapter 2. Electron Capture at Relativistic Energies; I. Introduction; II. Two-State Approximation; III. Second-Order Theories; IV. Relativistic Continuum Distorted Wave Approximation; V. Relativistic Eikonal Approximation.

VI. Numerical Solution of Coupled EquationsVII. Experimental Data and Comparisons with Theory; References; Chapter 3. The Low-Energy, Heavy-Particle Collisions-A Close-Coupling Treatment; I. Introduction; II. General Formulation of the Close-Coupling Method; III. Current Status of Theoretical and Experimental Results; IV. Conclusions and Perspectives; Acknowledgements; References; Chapter 4. Vibronic Phenomena in Collisions of Atomic and Molecular Species; I. Introduction; II. Outline of the Quantum Mechanical Formulation; III. Quantum Treatment of Vibronic Excitation: The IOS Approximation.

IV. Semi-Classical Treatment of Vibronic ExcitationV. On Franck-Condon-Type Approximations; VI. Studies of Vibronic Transition Processes; VII. Concluding Remarks; References; Chapter 5. Associative Ionization: Experiments, Potentials, and Dynamics; I. Introduction; II. Experiments; III. The Problem of Molecular Potentials; IV. Dynamics of Associative Ionization; V. Summary, Conclusions, and Perspectives; Acknowledgements; References; Chapter 6. On the ß-Decay of Re: An Interface of Atomic and Nuclear Physics and of Cosmochronology; I. Introduction.

II. The Relative Production Rates of Different Isotopes of Re and of OsIII. Refinements and Improvements; IV. Conclusion; Acknowledgements; References; Chapter 7. Progress in Low Pressure Mercury-Rare-Gas Discharge Research; I. Introduction; II. Modeling of Low Pressure Mercury-Rare-Gas Discharge; III. Altered, Low Pressure Mercury-Rare-Gas Discharge; IV. Diagnostics; V. Summary; References; Index; Contents of Previous Volumes.