TOC Front Cover 2 Solid State Physics, Volume 8 5 Copyright Page 6 Contributors to Volume 8 7 Preface 9 Contents 11 Contents of Previous Volumes 13 Articles Planned for Future Volumes 15 Chapter 1. Electronic Spectra of Molecules and Ions in Crystals 17 Part I: Molecular Crystals 17 I. Introduction 17 II. Electronic States of Molecular Crystals 18 Chapter 2. Photoconductivity in Germanium 65 I. Introduction 66 II. Electronic Structure of Germanium and Impurities 68 Front Cover 2 Solid State Physics, Volume 8 5 Copyright Page 6 Contributors to Volume 8 7 Preface 9 Contents 11 Contents of Previous Volumes 13 Articles Planned for Future Volumes 15 Chapter 1. Electronic Spectra of Molecules and Ions in Crystals 17 Part I: Molecular Crystals 17 I. Introduction 17 II. Electronic States of Molecular Crystals 18 Chapter 2. Photoconductivity in Germanium 65 I. Introduction 66 II. Electronic Structure of Germanium and Impurities 68 III. Photoconductivity Theory 72 IV. Preparation and Electrical Properties of Doped Germanium Crystals 80 V. Experimental Studies of Photoconductivity 94 VI. Germanium as an Infrared Detector 120 VII. Acknowledgments 123 Chapter 3. Interaction of Thermal Neutrons with Solids 125 I. Introduction 126 II. General Theory of Neutron Scattering 128 III. Cold Neutron Scattering 155 IV. Crystal Dynamics and Inelastic Scattering of Neutrons 167 V. Slowing Down of Neutrons near Thermal Equilibrium 184 VI. Appendix 202 Chapter 4. Electronic Processes in Zinc Oxide 207 I. Introduction 209 II. Preparation of Samples 212 III. Diffusion of Defects 219 IV. Optical Properties 232 V. Adsorption and Catalysis 252 VI. Conductivity in Thermal Equilibrium 262 VII. The Variation of the Conductivity as a Result of Various Influences 289 VIII. Discussion of the Conductivity (Parts VI and VII) 312 Chapter 5. The Structure and Properties of Grain Boundaries 341 I. Introduction 343 II. The Geometry of Grain Boundaries as Arrays of Dislocations 345 III. Observations Concerning the Geometry of Grain Boundaries 374 IV. Mechanics of Grain Boundaries as Arrays of Dislocations 409 V. Energy Measurements 436 VI. The Generation of Sub-Boundaries 451 VII. Diffusion along Grain Boundaries 475 VIII. Segregation and Precipitation of Solutes at Grain Boundaries 484 IX. Melting at Grain Boundaries 489 X. Boundary Migration 492 XI. Electrical Properties of Grain Boundaries 507 Show more