Concepedia

Abstract

Partial Contents: Units and Constants. Mathematical Methods. Angular Momentum Theory. Group Theory for Atomic Shells. Dynamical Groups. Computational Techniques. Hydrogenic Wave Functions. Atoms. Atomic Spectroscopy. High Precision Calculations for Helium. Atomic Multipoles. Atoms in Strong Fields. Ion Beam Spectroscopy. Thomas- Fermi and Other Density-Functional Theories. Many-Body Theory of Atomic Structure and Processes. Photoionization of Atoms. Quantum Electrodynamics. Tests of Fundamental Physics. Parity Nonconserving Effects in Atoms Molecules. Molecular Structure. Radiative Transition Probabilities. Molecular Photodissociation. Time-Resolved Molecular Dynamics. Gas Phase Ionic Reactions. Clusters. Infrared Spectroscopy. Laser Spectroscopy in the Submillimeter and Far-Infrared Region. Spectroscopic Techniques: Lasers. Spectroscopic Techniques: Ultraviolet. Scattering Theory. Elastic Scattering: Classical, Quantal and Semiclassical. Orientation and Alignment in Atomic and Molecular Collisions. Positron Collisions. Adiabatic and Diabatic Collision Processes at Low Energies. Ion Atom Charge Transfer Reactions at Low Energies. Continuum Distorted Wave and Wannier Methods. Dielectronic