Cover -- Half-title -- Series-title -- Dedication -- Title -- Copyright -- Contents -- Preface -- 1 Introduction -- 1.1 Historical remarks -- 1.2 Basic properties of the positron and other positronic systems -- 1 Positrons -- 2 Positronium -- 3 Other bound states involving positrons -- 1.3 Basic experimental techniques -- 1 Annihilation lifetimes -- 2 Doppler shift or broadening of the annihilation radiation -- 3 Angular correlation of annihilation radiation -- 1.4 Slow positron beams -- 1 Introduction to positron moderation -- 2 Magnetically confined positron beams -- 3 Electrostatic positron beams -- 4 Facility-based beams -- 1.5 The production of positronium -- 1 Basic physics of positronium production -- 2 Traditional methods -- 3 Methods using positron beams -- 1.6 The physical basis of the interactions of positrons and positronium with atoms and molecules -- 1 Positrons -- 2 Positronium -- 2 Total scattering cross sections -- 2.1 Introduction -- 2.2 Theory -- 2.3 Experimental techniques -- 2.4 General discussion of systematic errors -- 2.5 Results and discussion - atoms -- 1 Helium -- 2 Heavier noble gases -- 3 Alkali metals -- 4 Atomic hydrogen -- 2.6 Results and discussion - molecules -- 1 Hydrogen -- 2 Nitrogen -- 3 Carbon dioxide -- 4 Water -- 2.7 Partitioning of the total cross section -- 3 Elastic scattering -- 3.1 Introduction -- 3.2 Theory -- 1 Positron-hydrogen scattering -- 2 Positron-helium scattering -- 3 Positron scattering by alkali atoms -- 4 Positron scattering by other atoms and molecules -- 5 Elastic scattering beyond inelastic and rearrangement thresholds -- 3.3 Threshold effects -- 3.4 Angle-resolved elastic scattering -- 4 Positronium formation -- 4.1 Introduction -- 4.2 Theory -- 1 Positron-hydrogen scattering -- 2 Positron-helium scattering -- 3 Positron-alkali atom scattering -- 4 Other atoms and molecules.

4.3 Experimental techniques -- 4.4 Results -- 1 Noble gases and molecules -- 2 Atomic hydrogen -- 3 The alkali metals -- 4.5 Other processes involving positronium formation -- 4.6 Comparisons with protons -- 4.7 Differential cross sections -- 4.8 Dense gases -- 1 Models of the positronium fraction -- 2 Positronium formation fraction - results -- 5 Excitation and ionization -- 5.1 Excitation -- 1 Theory -- 2 Experiment -- 5.2 Ionization - theoretical considerations -- 5.3 Ionization - experimental techniques for integrated cross sections -- 5.4 Single ionization - results -- 1 Atomic hydrogen -- 2 The noble gases -- 3 Molecules -- 4 Comparisons with heavier projectiles -- 5 Near-threshold studies -- 5.5 Multiple ionization -- 5.6 Differential cross sections -- 5.7 Inner shell ionization -- 6 Positron annihilation -- 6.1 Introduction and theoretical considerations -- 6.2 Experimental details -- 1 The traditional positron lifetime method - analysis and observables -- 2 The positron-trap method for positron-gas studies -- 6.3 Results - positron annihilation -- 1 Thermalization phenomena -- 2 Equilibrium phenomena at low gas densities -- 3 Equilibrium phenomena - many-body effects -- 4 Electric fields -- 5 Angular correlation and Doppler broadening studies -- 6.4 Positron drift -- 7 Positronium and its interactions -- 7.1 Fundamental studies with the positronium atom -- 1 Lifetimes against annihilation -- 2 Spectroscopic properties -- 3 Non-spectroscopic laser studies of positronium -- 4 Exotic tests involving positronium -- 7.2 Theoretical aspects of annihilation and scattering in gases -- 1 Annihilation -- 2 Scattering theory -- 7.3 Experimental studies of positronium annihilation in gases -- 7.4 Slowing down -- 7.5 Bound states involving positronium -- 7.6 Studies with positronium beams.

1 The production of positronium beams by positron-gas collisions -- 2 Scattering experiments with positronium beams -- 8 Exotic species involving positrons -- 8.1 The positronium negative ion -- 8.2 Systems containing more than one positron -- 8.3 Antihydrogen -- 1 Introduction -- 2 Antiproton deceleration, trapping and cooling -- 3 Possible methods of low energy antihydrogen production -- 4 Prospects for antihydrogen physics -- Appendix Positron conference proceedings -- A International conferences on positron annihilation -- B International workshops on positron collisions in gases -- C International conferences on slow positron-beam techniques -- D Positron and positronium chemistry -- E Others -- References -- Index.