Positron Annihilation - ICPA-9: (Volumes 105-110 Materials Science Forum)

The volumes present over 400 reviewed papers on the present state of the art and future prospects in the wide field of research involving positrons. The foreword by Edward Teller and the summaries by Jean-Charles Abbe (Chemistry) and Alfred Seeger (Physics) demonstrate how the field is seen from "outside" and from "inside".

Table of Contents:
Preface Stephan Berko 1924-1991 In Memoriam Kumo Fujiwara Spins, Symmetries and Anti-Matter: Contributions of Arthur Rich to Atomic Physics In Memoriam Bronislaw Rozenfeld Ab-Initio Calculations of Vacancy Formation and Vacancy-Solute Interaction Energies in Metals Positron-Emission-Tomography: A New Technique for Analyzing Biochemical Reactions in the Living Human Body Antiprotons, Positrons and Antihydrogen Annihilation Progress in Fundamental Positron Physics at Low Energies Fermi Surface and its Implications in the High Temperature Superconductor YBa2Cu3O7 Small and Fast: Some Contemporary Aspects of Radiation Chemistry Current Problems of Defects in Semiconductors – Interaction of Defects with Impurities The Miracle of Superconductivity Theoretical Electron-Positron Momentum Density and 2D-ACAR Positron Experiments in YBa2Cu3O7 Enhancement Factors in Metals Defects in Reactor Steels – A Challenge to Positron Annihilation and Other Methods Spin States of Positron Compounds ACAR Study in Metal Oxides Experiments on Positron Implantation Vacancies and Negative Ions in GaAs Positron Studies of Gases and Gas Bubbles in Metals The Electron-Positron Momentum Density and Fermi Surface of YBa2Cu3O7-x Positronium in Zeolitic Materials – Sepiolite Electronic Structure in High Temperature Superconducting Oxides Mass Spectrometry Studies of the Ionization of Large Organic Molecules by Slow Positrons ACAR Study of Positronium-Gas Molecule Interactions Positron and Positronium Localization in Liquids and Gases Theory of Ion Desorption due to Positronium Formation at Solid Surface Depth Profiling of Defects in Low Temperature MBE-Grown Silicon Free-Volume Properties of Polymers Probed by Positron Annihilation Spectroscopy Positron Transport and Surface Interactions Momentum Density Reconstruction from 2D ACAR Data Vacancies in II-VI- and IV-VI Compound Semiconductors Studied by Positron Lifetime Spectroscopy Positron Annihilation at Clean Metallic Surfaces New Results in Atomic Physics with Positrons Slow Positron Studies of Hydrogen Interaction with SiO2/Si(100) Interfaces Positron Mobility and Trapping in Semiconductors The Electronic Structure of the Heavy-Fermion System URu2Si2 Path Integral Formulation of Positron and Positronium Lifetimes in Fluids "Squeezed" Positronium in Condensed Matter Measurement of the Decay Rate and 2-Gamma Branching Ratio of Orthopositronium Positron Annihilation in YBaCuO Theory of Positron Annihilation and Trapping in Semiconductors Latest Results in Compton-Profile Studies Thermal Formation of Vacancies in Intermetallic Compounds Positronium Localization in Spontaneous Density Fluctuations in Molecular Gases A Two-Dimensional ACAR Study of Untwinned YBa2Cu3O7-x Positron Lifetimes in Solids from First Principles Calculations Temperature Dependence of Positron Annihilation Parameters in High Temperature Superconductors On the Electron-Momentum Distribution in the Superconducting State Electronic Structure in Semiconductors Studied by Two Dimensional Angular Correlation of Positron Annihilation Radiations The Electron Momentum Distribution of LiMg Alloys by Positron-Annihilation 2D-ACAR Positron Annihilation Induced Auger Electron Spectroscopy Determination of the Gamma-Ray Energy of Parapositronium in Two Gamma Decay Absolute Differential Cross Sections for the Impact Ionization of Helium by 55 eV Positrons Search for Resonant States in Positron Electron Scattering Evidence for CW 1S-2S Excitation of Positronium Preliminary Results on Impact Ionization of Molecular Hydrogen by Electrons and Positrons Investigation of Excited State Positronium Multi-Photon Optical Excitation of Positronium Elastic Scattering of Positrons by Helium and Neon Atoms L-Shell Ionization by Positron and Electron Impact Efficient Formation of n=2 Positronium Positron Annihilation in Ferroelectric Crystals Identification of ACAP Components in Thallium Series High-Tc Superconductors Formal Valency of Cu(1) in YBa2Cu3O7-x and Electron Momentum Distributions: 1D-ADAP Data Results of Systematic Study of Annihilation Photons 1D-Angular Distributions in Diamond-Like Semiconductors The Influence to 1D-ADAP Parameters in Re-Ba2Cu3O7-x Oxides by Variations of Re-Elements, Oxygen Content and Temperature Positron Mobility in Gallium Arsenide Positron Lifetime in C60/C70 Powder Effects of Enhancement for Positron Annihilation in High-Tc Oxides Temperature Dependence of the Positron Diffusivity in Cubic Crystals Calculation of Positron-Electron Enhancement Factors for Real Metals on a Base of Band Structure Data Positron Affinities for Carbides Study of Three Dimensional Electron-Positron Momentum Density in GaSb Study of Three Dimensional Electron-Positron Momentum Density in InP Positron Annihilation in Fe-Co Alloys Positron Annihilation with Rare-Gas Core Electrons: Momentum Dependence of Enhancement Factor High Sensitivity of Rare-Gas Core Positron Annihilation Characteristics in Metals to the Lattice Dimensions and to the Parameters of Electron and Positron Models Electronic Structure of Pd-Ag(Au) Alloys Investigated by Positron Annihilation Spin-Polarized 2D ACAR in Nickel Across the Curie Temperature Positron Lifetimes in Metals Fermi Surface Study of YBa2Cu3O7 by 2D-ACAR Structural Features in Icosahedral Al63 Cu25 Fe12 Positron Annihilation Studies of Barium Titanate Ceramics A Doppler Broadening Study of Dilute Ni-Transition Metal Alloys Positron Annihilation Studies on the Heavy Electron Compounds of LaSb and CeSb On the Tl Valent States in Ga-Tl-Te System on the Basis of Positron Annihilation Data Age-Momentum Correlation in Electron-Positron Annihilation of Natural Diamond Positron Study of Momentum Density and Fermi Surface in Cu Study of Spin Dependent Positron-Electron Momentum Density in Ferromagnetic Co by Two Dimensional Angular Correlation of Positron Annihilation Radiations Electronic Structure in Nd2-xCexCuO4 and Pr2-xCexCuO4 Studied by Two Dimensional Angular Correlation of Positron Annihilation Radiations Electronic Structure in Bi2Sr2CaCu2O8 Studied by Two Dimensional Angular Correlation of Positron Annihilation Radiations Influence of the Local Density Function on the Momentum Dependence of the Electron Density The Effective Electron Density Parameter for Metals Positron Annihilation in Zn and Cd Are there a Charge-Density Wave or a Spin-Density Wave in the Cu-0 Chain in Y-Ba-Cu-0 Superconductors? Angular Distribution of Positron Annihilation Radiation in RSb(R=La, Ce and U) Positron Annihilation Study in La2CuO4 Positron-Annihilation Studies of the Electronic Structures of RB6(R=La, Ce, Pr and Nd) Three Dimensional Electron-Positron Momentum Density in Both Paramagnetic and Antiferromagnetic Cr Three Dimensional Electron-Positron Momentum Density in V, Nb and Ta Three Dimensional Electron-Positron Momentum Density in Paramagnetic Cr, Mo and W Infiuence of Static and Alternating Fields on Positron Lifetimes in Silicon and Germanium Temperature Dependence of Positron Lifetime in Single Phase Bi-Sr-Ca-Cu-0 Superconductor Positron Lifetime in Synthetic Diamond Electron-Positron Momentum Density in Ge and Diamond Angular Correlation Distribution and Electron Momentum Distribution of Graphite Application of the Positron-Electron Product Formalism for Al and Si Systematic Positron Studies of High Temperature Superconductivity: Neutron-Irradiated YBa2Cu3O7 Positron-Annihilation 2D-ACAR Measurements in the High-Tc Superconductor Bi2Sr2CaCu2O8+x Positron Mobility in Natural Diamond Positron Angular Correlation Studies of YBa2Cu3O6+x and YBa2Cu408 Superconductors Positron Study of Fermi Surface and Electron Momentum Density in Mg Three Dimensional Electron-Positron Momentum Density in 2H-NbSe2 Positron Study of Fermi Surface and Electron Momentum Density in Al Positron Study of Electron Momentum Density and Fermi Surface in β'-AgZn Positron States in GaAs: First-Principles Molecular Dynamics Studies Application of the LCAO Method to the Calculation of Positron Wavefunctions in Alkali Metals Positron Polarisation in Semiconductors from LDA Electron Momentum Distributions in Sodium and Lithium Positron Annihilation in Organic Single-Crystals Field Dependence of Positron Mobility in Semiconductors Positron Lifetime and Annihilation Site in C60/C70 Fullerites The Determination of Positron Diffusivities from Lifetime Measurements on Fine-Grained Polycrystals Self-Trapping and Anisotropic Positron Diffusion in the Hexagonal Close-Packed Metals Zn and Cd Positron Annhilation in Icosahedral Phase and Crystal Phase of AlLiCu Alloys Electron Momentum Distribution in Vanadium High Temperature Positron Diffusion in Si, Ge and GaAs The Influence of Crystal Potential and Positron Wave Function Anisotropy on the Momentum Density of Electron-Positron Pairs The Role of Electron and Positron Scattering States within the Bloch-Modified Ladder Expansion Electron-Positron Interaction in Jellium: Liquid Theory Approach Electron-Positron Interaction in an Electron Gas at Low and High Densities Systematics of Two-Photon Momentum Distributions in 3d Transition Metals Positron Annihilation Rates in Simple and Transition Metals by Local Density Approach - Comparison of Recent Results Positron Annihilation Study of Spin-Crossover in [Fe(ptz)6](BF4)2 Single Crystals Measurement of Positron Mobility in GaAs by Lifetime Technique Positron Annihilation Study on Age-Hardened Al Alloys PAS of YBa2Cu3O7 γ-Irradiated Compounds The Specific Capture Rate of Positrons at Dislocation in Copper Investigation of the Electron and Atomic Structures in Metallic Glasses Fe78-xCoxSi9B13 before and after Crystallization by Means of Positron Lifetime and X-Ray Methods Effects of Lattice Imperfections and Phase Transformations on Tc Value in YBa2Cu3Oy HTS. PA and TSL Studies Positron Annihilation and Mössbauer Spectroscopy of B2 Alloys Positron Annihilation Studies of Neutron-Irradiated CrMoV-Type Pressure Vessel Steel Positron Annihilation Characteristics at Small Solute Clusters in Al-Matrix A Doppler Broadening Steel Annealing Study A Study of Structural Defects in Sputtered ZrN Films Investigation of Hydrogen Induced Defects in Iron by PAT and HREM Point Defects in Neutron Transmutation Doped CZ Silicon The Effect of Point Defects Introduced by Proton Irradiation on Positron Annihilation in Si Vaeancy Type Defects after Post-Growth Quenching and Re-Annealing of Si GaAs The EL2 Defect and Vacancy in GaAs Positron Lifetime Study in Quenched and Irradiated Pb and Concentrated Pb(Ag) Alloys Study of the Nature of the Defects in a Highly Neutron-Irradiated RPV Steel Recovery Process in a Li-Rich Deformed Al-Li Alloy Positron-Twins Interaction in Deformed Ti Positron Annhilation in the Ba(PO3 )2 - Na3 AlF6 Glass System Annihilation Characteristics in As-Grown and Electron Irradiated Zn II-VI Semiconductors Temperature Dependence of the Positron Annihilation Parameters in III-VI Layered Semiconductors The Influence of Li in the Nucleation of Vacancy Loops in an Al-Li Alloy A Recovery Study of Electron Irradiated Al-Li Alloys Study of Recovery and Recrystallization in Deformed Ni-Cr-Co Superalloys by Positron Annihilation Positron Studies of Decomposition in Al-Li Based Alloys A Positron Study of the Temperature Dependence of the Guinier-Preston Zone Composition in Al-Ag Alloys Positron Trapping Model in N-Type Semiconductors with Vacancies Positron Annihilation in β- and β'-Vanadium Oxide Bronzes Study of the Tungsten Bronze Ag0.01 WO3 Using Positron Annihilation Method A Positron Lifetime Study of Defect Recovery in Electron Irradiated Zircaloy-2 and Zr-2.5 Nb Structural Relaxation in Metallic Glasses by Means of Positron Lifetimes Methods High-Temperature Equilibrium Vacancy Formation in Ceramic Materials Studied by Positron Annihilation Positron Studies of Solute Clustering in Al-Ag Alloys Investigation of Radiation Defects in Proton Irradiated Silicon Diagnostics of Radiation Defects in Silicon Carbide Positron Trapping by the Platelet Precipitations of AlCu Positron Annihilation Study of Metallic and Semiconductor Films Positron Annihilation Studies in Hf Doped YBCO Structural Relaxation and Crystallization of Electrodeposited Amorphous Co-W Alloys Irradiation-Induced Defects in Graphite and Glassy Carbon Studied by Positron Annihilation Positron Annihilation Study of Effects of Aging on Martensite Transformation Defects in a Cu-Base Shape Memory Alloy Positron Lifetime Spectroscopy in Y1Ba2Cu3O6+x Axial Fatigue Damage in Superalloys Measured by Positron Annihilation Deformation-Induced Vacancy Clusters in InP Studied by Positron Annihilation The Study of ZnO Ceramic Varistors by Positron Annihilation The Study of Neutron-Irradiated Si by Positron Annihilation Effect of Oxygen Concentration on the Positron Annihilation in the Y-Ba-Cu-0 Ceramics Temperature Variation of Positron Lifetime in YBa2(Cu1-xMx)O7-y(M:Fe,Ni,Zn) Defects in Electron or Proton Irradiated Undoped and Si-Doped GaAs by Positron Annihilation Positron Annihilation and D.S.C. Studies on Quenched-in Defects in NiSb Search for Defects in Quasicrystals by Positron Annihilation Comparison of Positron-Lifetime Spectroscopy and Differential-Dilatometric Measurements of Equilibrium Vacancies in Copper and α-CuGe Alloys Study of Deformed Si and Ge by Positron Lifetime Measurements Positron Studies of Annealing and Precipitation in Quenched Al-Sc(0.003-6 at %) Alloys Positron Lifetime Studies of Decomposition in Al-Li and Al-Li-(Cu, Mg or Sc) Alloys Positron Annihilation in Quasicrystalline Alloy Al65Cu20Fe15 On the Behaviour of Positrons in Semiconductors in Presence of External Electric Field Perturbation Effect of On-Line Light Irradiation on Positron Lifetimes and Their Relevance to the Defects in Semiconductors Positron Annihilation Lifetime Measurement of Electron-Irradiated Fe-Cr Alloys Positron Annihilation Measurements in the YBa2Cu3CdxOy System The Investigation of Creep in 12Cr1MoV Steel by Positron Annihilation W-Co-C Films on Ni Substrate Studied by Positron Annihilation Study of Defects Produced by Laser Surface Melting Using Positron Annihilation Point Defects in ZnO:Mn and Their Relation to Luminescence Centres Positron Localisation in Metallic Glasses A Positron Study of Vacancy-Impurity Interaction in Decomposed Cu-Sn Alloy Radiation Centres in Quartz Glass Positron Annihilation at Defects in Quenched Aluminum Decomposition and Coarsening of Cu-10at% Be and e+-Annihilation Positron Study of Copper-Nickel Alloys Point Defects in GaP Studied by Correlated Positron Lifetime and Hall Measurements Defect Characteristics in Natural and Synthetic Pyrite Crystals Investigation of Vacancies in Pdln Alloys Defect Distribution across 6-Inch CZ-Silicon Wafers Divacancy Mechanism of Brass Dezincificating Verified by Means of PAS Positron Annihilation Study of Palladium-Deuterium System Helium in Palladium Studied by Positron Annihilation Positron Annihilation Study of Structural Relaxation and Crystallisation in Cobalt Based Metallic Glass 2D-ACAR Measurements in Tungsten with Voids Decorated with Deuterium Study of Positronium Atoms in Alkali Halides with Positron Lifetime Spectroscopy Positron Studies of Deformed and Quenched FeCu and FeCuNi Alloys The Effect of Change in the Positron Lifetime at the Superconducting Transition in YBa2Cu3O7-delta and the Ortho-Para Conversion of Positronium in Microvoids Positron Annihilation Study of Nickel Foils Irradiated with High Energy Helium Ions Systematic Change in Positron Lifetime with the Magnitude of Burgers Vectors of Dislocations in Metals Lattice Defects in Intermetallic Compound TiAl Studied by Positron Lifetime Spectroscopy Positron Annihilation in Cadmium Mercury Telluride Positron Diffusion in a Fine-Grained Aluminum Alloy Quenched-in Defects in β Cu-Zn-Al Alloys. A Positron Lifetime Study Positron Lifetime Study in an Eutectic Alloy Pb79Sb16Sn5 Positron Lifetime Study of the Interfacial Defects in Nanocrystalline Ni-P Alloys Positron Lifetime Studies in Undoped and Sr Doped La2Cu04 Positron Diagnostics of the Neutron Irradiated and Hydrogen Charged Molybdenum Defect Production and Hydrogen Localization in Deformed Nickel Defect Recovery in DC-Cast and Hot-Rolled AlMn(FeSiCu) Alloys Positron Annihilation in Undoped and Ag-Doped YBa2Cu3O7-x Superconductors The Application of Positron Annihilation Methods for Investigation of Structure of Modified Fine Powder Silicas Positron Annihilation Lifetime Measurement of Electron Irradiated ZnO Crystals Positron Lifetirne Measurements in 14 MeV Neutron Irradiated Beryllium Positron Annihilation in Molybdenum Irradiated by Fusion Neutrons and Plastically Deformed A Model for Positron Trapping at Voids in Metals Negative Temperature Dependence of Positron Trapping in Metal Single Crystals Oxygen Microclusters in Quenched Si Studied by Positron Annihilation A Positron Lifetime Study of Si-Doped Vacuum Melt-Spun Al Positron Annihilation Studies of Defect Structures in Vacuum Melt-Spun Pure, Carbon and Oxygen Doped Al Evidence for Temperature-Dependent Trapping in Pure and Iron-Doped YBa2Cu3O7 The Recovery Behavior of Quenched-In Vacancies in CuAlBe Shape Memory Alloys Study of the Crystal Defects in the FeCrNi Alloy Positron Studies of Capillary Condensation of Gases Adsorbed in Mesoporous Solids: A Pilot Study Positron Trapping Rates and Lifetimes of Vacancy-Impurity Complexes in α-AgSb Alloys Vacancy Studies in Melt-Spun Shape Memory Alloys Size and Compressibility of Free Volumes in Nanocrystalline Materials Positron Annihilation in Three-Dimensional Defects The Study of Ni-Ti Shape Memory Alloys by Positron Annihilation Technique and DSC A Search for Positronium Production at a Monolayer Surface on Boron Nitride Powder Positronium Production at a Physisorbed Layer of Ethylene on Grafoil Solid Neon Moderator with a Large Activity Source Positron Workfunction of Diamond C(100) Surfaces Thermal Evolution of Defect Profiles in H-Implanted Silicon Studied by Slow Positrons Positronium in Silica Powder in the Presence of Oxygen, Nitrogen and Carbon Monoxide Anomalous Positronium Production when Carbon Monoxide is Condensed on Exfoliated Graphite The Effect of Annealing Unimplanted and Krypton Implanted Uranium Dioxide Using Positrons Annealing Effects at the Near-Surface Region of Gallium Arsenide The Study of Se- and Si-Implanted GaAs by Slow Positrons Positron Beam Analysis of Amorphous Silicon Theory of Absorption Coefficient of LEPD Beam due to Positronium Formation at Surfaces Determination of the Positron Work Functions of Cu(100) and Polycrystalline Fe, Mo, Ni, Pt, Ti and V Angle-Resolved Monte-Carlo Calculations of Positron Backscattering from Solids Investigation of Positron States at the Cs/Cu(100) Surface Using Positron Annihilation Induced Auger Electron Spectroscopy (PAES) Temperature Dependent Top Layer Composition of Pd on Cu(100) Positron Annihilation Induced Auger Electron Emission from Polycrystalline Fe, Cu, Pd and Au Positron Annihilation near Fractal Surfaces Study of Point Defects in Impurity-Doped ZnSe by a Monoenergetic Positron Beam Electric Field Effects in Positron Diffusion and Annihilation in the Laminar Substances Implantation and Diffusion in Thin Films Annealing of Silicon Implantation Damage in Indium Phosphide Ion Implantation Damage in Silicon Studied Using Slow Positrons, RBS and Infrared Absorption Positron Beam Studies on Cadmium Mercury Telluride Positron Beam Measurements on Hydrogen Implanted Silicon Characterisation of an SiO2/Si Interface with Slow Positrons Positron Lifetimes on Clean Metallic Surfaces Investigation of Near Surface Defects by Variable-Energy Positron Lifetime Spectroscopy Study of Interfacial Reactions in W/Si Systems by a Monoenergetic Positron Beam Study of Oxygen Atom Clustering in Si Induced by External Stress by Means of a Monoenergetic Positron Beam Variable-Energy Positron-Beam Studies of Si Implanted with MeV-Energy Ions A Diffusion of Positrons by an Electric Field in MOS Transistors Vacancy-Type Defects in Si+- and B+-Implanted Si Probed by a Monoenergetic Positron Beam Monoenergetic Positron Beam Studies of Near Surface Defects Induced by Low Dose Be-Implantation Characterization of Point Defects in Impurity-Doped GaAs by Slow Positrons The Effect of Point Defects on the Electrical Activation of Si-Implanted GaAs during Rapid Thermal Annealing Studied by Slow Positrons The Study of Surface State of III-V Compound Semiconductors by Slow Positrons Positron Lifetime Study of Polymers Positronium Formation in Aqueous Solutions of Surfactant Substances TSES (Time-Selected-Energy-Spectrum) Study of Positronium-Oxygen Interactions Positronium Polarization in Liquids A New Lamellar Phase in CTAB/Water/Hexanol System On the Existense of a Bicontinuous Phase in CTAB/Water/Hexanol Reverse Micellar Systems Triplet Ps Annfhilation Parameters in Abs. EtOH/Cis-2-Pentene and D2O Mixtures Containing Pt and Pd Catalysts Positron Studies in Some Organic Scintillators Positron Annihilation Studies of A-Type Zeolites Positronium Reactions with Cu(II) Ions in Water Positron Annihilation in Molecular and Biological Systems Positron Annihilation in CaSO4.2H2O Free Volume Measurements in Polyimides by Positronium Annihilation The Reduction of Surface Oxide on Ultra-Fine FeNi Particles On the Positronium Spin Exchange Reactions Promoted by 3d Aqua Ions The Nephelauxetic Effect and o-Ps to p-Ps Conversion Reactions Promoted by Cr(III) Complexes Large Free Volume Defects in n-Octacosane Positronium in Pyroelectric Phenanthrene Ps-Bubble States in Organic Liquids Determined from o-Ps Lifetime Distributions Positron Annihilation Lifetime Studies of Protein Hydration Monte Carlo Calculations of Radical Proximity Functions around Thermalising Positrons in Water Positron Annihilation Studies in Cyclodextrin Derivatives Response of DBAR Parameter to Ultra-Violet Light Induced Electronic Structure Changes in a Conjugated Polymer Vapor Absorption Process in Polyethylene Observed by PAL A New Model of Positronium Formation - Resonant Positronium Formation Investigation of the Structure of Cyclohexane + t-Butanol Solution; Positron Annihilation and Ultrasonic Methods Structure of Carbon Tetrachloride + t-Butanol Mixtures from Positron Annihilation and Ultrasonic Velocity Measurements Positron Lifetime Spectroscopy in Polystyrene Quenching of Ortho-Positronium Atoms by Nitrobenzene in Various Solutions Positron AnnihiIation Studies of Homologous Series of Alkoxybenzilidene-Toluidine Positron Annihilation Studies in Some Alkyl and Alkyloxy Cyanobiphenyls Meisenheimer Complex Formation Studied by Positron Annihilation Studies of Fe2O3/γ-Al2O3 Surfaces by Positron Annihilation, Mössbauer Spectroscopy and Scanning Electron Microscopy Positron Annihilation Studies in PMMA Polymer Graft Polymerization of Methyl Methacrylate onto Polyethylene Films Studied by Positron Annihilation Technique Positron Annihilation Study on Solid Solutions and Mixtures, Using Lifetime Spectroscopy Technique Positron Annihilation Spectroscopy of Moisture Sorption in Protective Epoxy Coatings Positron Annihilation Studies in Some Solid Metallic Complexes Study of Hemin in Water/Ethyleneglycol Mixtures by Positron Annihilation Spectroscopy Studies of Acidity in Solids with Positron Annihilation Techniques Positron Annihilation in Polyvinyliden Fluoride Energy Loss of Positronium in Helium Gas Free Volumes in Polymers; Positron Annihilation vs. Other Methods Positron Annihilation and Mössbauer Effect Studies of Iron-Dextran Complexes Isochronal Annealing Study of Positron Trapping Centres in a Polymer Matrix Positron Annihilation Studies in Lysozyme and Catalase Positron Lifetimes and Free Volume of Polycarbonate under Tensile Strain Combined Lifetime-Momentum Measurement of Ortho-Positronium in Polymers "Positronium Bubble" and Positronium Chemical Reactions in Liquids Dependence of o-Ps Lifetime Parameters on n-Alkane Chain Length and on Temperature Positron Lifetime and Optical Studies on Polyethylene Glycol Magnetic Quenching Experiments in Liquid Rare Gases On the Broad Momentum Component in Condensed Rare Gases Variation of Free Volumes in Polyvynil Alcohol Studied by Positron Annihilation Positron Annihilation in Epoxy Resins Positron Lifetime Spectroscopy Study of γ-Irradiated Epoxy Resin: Dose and Time Dependent Measurements Positron Annihilation on the Pure and Modifed Surfaces of Thirsty Glasses Increase of I4 at Melting Point Found in Polyethylene and Serious Thermal Hysteresis Found in Polypropylene Investigation of Polymer Relaxation after Deformation by Positron Annihilation (for Polyimid) Free Volumes in Amine-Cured Epoxy Studied by Positron Annihilation Two Long Lifetimes in Liquid Normal Hexane Positron Annihilation in Elastomers with Simulated Modification of Free Volume Study of Energy Transfer Process in Light Absorbing Pigments: Chlorophyll, Using Positron Annihilation Technique Thermal Variation of the Lifetimes in Five Epoxy Resins A Positron Lifetime Study of Solid-Solid Transitions in Partially Polymerized HDODA Some Subjects of Positron Annihilation Studies in Polymers Positron Annihilation Kinetic Energy Distributions of Different Lifetime Components in Teflon Polymer Temperature Curves of Positron Annihilation Lifetime Parameter in Polyethylene Teraphthalate Study of Composition of Positron Annihilation Lifetime Spectrum and Temperature Effect on Lifetime Parameters in Polymer PVC. Part I. Study of Compositlon of Positron Annihilation Lifetime Spectrum and Temperature Effect on Lifetime Parameters in Polymer PVC. Part II. The Relations between Positron Annihilation and Conductivity of Non-Metal Conductors Probing Redox Reaction of Unusual Valence Nickel (IV) in Aqueous Medium by Positronium Decrease in o-Ps Formation in Polymers during Positron Lifetime Measurements Effect of Sorbed Water and Amide Content on the o-Ps Lifetime in Polyamides Positron Behaviour in PHB Polymer Positron Annihilation Studies in Aqueous and Non-Aqueous Binary Solutions of TTAB A New Positron Polarimeter A Slow-Positron Source Project Using the Photon Factory Electron Linac First Tests of an Antiproton Anticyclotron at LEAR Beyond 106-Count Lifetime Spectra Using Hamamatsu Tubes and Pilot U A High Resolution Doppler-Broadening Spectrometer Tungsten Singlecrystal and Polycrystalline Foils Used as First Transmission Moderator Improvements in the Acquisition and Analysis of Doppler-Broadening Annihilation Spectra On the Evaluation of the Fraction of Orthopositronium in Lifetime Spectra S-Parameters and Count-Rate Development and Use of a Multi-Wire Proportional Chamber Positron Camera at a Clinical Site without a Cyclotron Electrostatic-Transport Positron Beams: Recent Developments at UEA Recent Developments in the Determination of Positron Annihilation Rate Distributions by Regularized Solution of Integral Equations Monte-Carlo Calculation of Positron Implantation in Multi-Layered Materials Rare-Gas Solids as Positron Moderators in "Critical Environments" Dynode Timing Electronics Development of a New Positron-Camera for 2D-ACAR Measurements Intense Brightness Enhanced Positron Beam from an Electron Linac and its Applications Continuous Lifetime Distribution Using Laplace Inversion Method Use of Image Processing Techniques in the Analysis of Positron Annihilation Spectra Performance Analysis in Positron Annihilation Methods High-Purity CsI Scintillators for Fast Timing Applications A Pulsed Positronium Beam An Electrostatic System for Investigating Positron - Atom Collisions Data Analysis and Diagnostic Package for Lifetime Spectra of Multilayered Samples Electro-Production of Intense Slow Positron Beams Compact, Magnetically Guided Slow Positron Beam for Defect Studies The Positron-Clock Principle Study of Positronium in Condensed Matter with Polarized Positrons Generalized Tent Functions Current Status of the MUP-PET Positron Camera Development Modifications to the Ghent Slow Positron Beam Performance Characteristics of Eighteen Positron Lifetime Spectrometers PAS Studies on the New Topic: Cold Nuclear Fusion Computerized Positron Lifetime Spectrometer and Graphic Interface for the Lifetime Spectra Analysis A Positron Annihilation Age-Momentum Correlation Measurement System On Source Contributions to Positron Lifetime Spectra Optimization of Beam Parameters for Positron Microanalysis Maximum Entropy Analysis of Positron Annihilation Lifetime Spectra Low Energy Positron Flux Generator for Microstructural Characterization of Thin Films β+γE Age-Momentum-Correlation Measurements with an MeV Positron Beam Positron Pulsing System for Variable Energy Positron Lifetime Spectroscopy Test of 3D Momentum Density and Fermi Surface Reconstruction An Experiment to Demonstrate the P-Parity Conservation in e--e+ Annihilation Data Acquisition and Analysis Program POSIT A New Concept for a Pulsed Positron Source The Focusing of a Positron Beam by an Electrostatic Lens and an Increasing Magnetic Field Positronium Beam Experimentation Spherical Symmetry Brightness Enhancer for Accelerator and Reactor-Based Positron Beams Summary on Positron and Positronium Chemistry Physics Summary Talk