Front Cover; Advances in Atomic and Molecular Physics, Volume 15; Copyright Page; Contents; List of Contributors; Introductory Conference Address; Chapter 1. Negative Ions; I. The Ground State of Negative Atomic Ions; II. Excited States of Atomic Negative Ions; III. Electron Affinities and Structures of Negative Molecular Ions; IV. Dissociative Attachment; V. Photodetachment and Photodissociation; VI. Ionic Reactions at Thermal and Epithermal Energies; VII. Ionic Reactions at High Energies; VIII. Negative Ions in Electric Discharge and Breakdown Phenomena; References.

Chapter 2. Atomic Physics from Atmospheric and Astrophysical StudiesI. Introduction; II. Dissociative Recombination; III. Ion-Molecule Reactions; IV. Neutral-Particle Reactions; V. Accidental Resonance Charge Transfer; VI. Charge Transfer of Multiply Charged Ions; VII. Fine-Structure Transitions; VIII. Radiative Association; IX. Microwave Spectroscopy; X. Oscillator Strengths and Branching Ratios; XI. Radiative Recombination; XII. Spontaneous Radiative Dissociation of Diatomic Molecules; XIII. Relativistic Magnetic Dipole Transitions; References; Chapter 3. Collisions of Highly Excited Atoms.

I. lntroductionII. Thermal Collisions with Heavy Particles; References; Chapter 4. Theoretical Aspects of Positron Collisions in Gases; I. Introduction; II. Positron-Hydrogen Elastic Scattering; III. Positron-Helium Elastic Scattering; IV. Annihilation in Positron-Atom Scattering; V. Angular Correlations in Positron Annihilation; VI. Positronium Formation in Positron-Atom Collisions; VII. Concluding Remarks; References; Chapter 5. Experimental Aspects of Positron Collisions in Gases; I. Introduction; II. Scattering Techniques with Positron Beams; III. Accuracy of the Cross Section Data.

IV. Total Cross Section MeasurementsV. Lifetime Studies; References; Chapter 6. Reactive Scattering: Recent Advances in Theory and Experiment; I. Introduction; II. Potential-Energy Surfaces; III. Classical Trajectory Methods and Results; IV. Transition-State Theory: New Developments; V. Collisional Ionization: Nonadiabatic Reactions; VI. Accurate Quantal Scattering Calculations; VII. Information-Theoretic Approach to Reactive Scattering; VIII. Molecular-Beam Chemistry; IX. Crossed-Beam Chemiluminescence; X. State-to-State Cross Sections.

XI. Influence of Different Forms of Energy upon ReactivityXII. Translational Thresholds; References; Chapter 7. Ion-Atom Charge Transfer Collisions at Low Energies; I. Introduction; II. Symmetrical Resonance Processes; Ill. Nonresonant Atomic Charge Transfer Processes; IV. Total Cross Sections of Pseudocrossing Atomic Charge Transfer Processes; V. Curve-Crossing Spectroscopy; VI. Charge Transfer Processes of Excited Ions; References; Chapter 8. Aspects of Recombination; I. lntroduction; II. Radiative e-O+ Recombination and the Nightglow; III. Complex Ions.