Table of contents

CONTENTS Introduction 83 1. The Nature of Pulsars 83 2. Rotating Magnetized Neutron Stars 85 3. Structure of Neutron Stars and Pulsars 86 4. Electrodynamics of Rotating Magnetized Stars 89 5. Mechanisms of Pulsar Radiation 92 6. Certain Models of Radiating Regions of Pulsars 95 7. Use of Pulsars in Astronomy and Physics 98 8. Concluding Remarks 99 Cited Literature 101

*Paper prepared for the 14th general assembly of the International Astronomical Union (Brighton, Great Britain, 18-27 August 1970). Published also in "Highlights of Astronomy."

This article is based on a paper given by the authors at a scientific meeting of the Division of General Physics and Astronomy of the Academy of Sciences of the USSR on May 30, 1968.

CONTENTS I. Fundamental Equations 113 II. The Normal Skin Effect 116 III. The Anomalous Skin Effect 120 References 123

CONTENTS Introduction 125 1. Nonrelativistic theory of systems consisting of three particles 128 2. Separable representation of two-particle t matrix 133 3. Bound states and scattering in a system of three identical spinless particles 140 4. Bound states and scattering in a system of three nucleons 143 Cited literature 152

CONTENTS Introduction 154 1. Spin reorientation in rare-earth orthoferrites 154 2. Elastic properties of orthoferrites and features of their behavior near the spin-orientation temperature 156 3. Influence of pressure on the spin-reorientation temperature 160 Cited literature 161

CONTENTS 1. Introduction 163 2. Formulation of problem and initial equations 164 3. Limiting currents in uncompensated electron beams 165 4. Critical currents in compensated unbounded electron beams 168 5. Influence of finite longitudinal dimensions of the system on the critical currents in electron beams 170 6. Interaction of unbounded relativistic electron beams with a plasma 172 7. Stability of bounded electron beams in a plasma 174 8. Critical currents of relativistic electron beams in a plasma 175 9. Comparison of theory with experiment 176 Cited literature 178

Table of Contents I. Introduction 180 II. The Structure of Diamond 180 III. Formation of the Energy Bands 181 IV. The Brillouin Zone 182 V. Quantitative Calculations of the Energy Bands 183 VI. Investigation of the Band Structure by Optical Methods 187 VII. Fundamental Physical Properties 188 VIII. Semiconducting Diamonds 190 IX. Characteristic Properties of the Band Structure of a Real Diamond 191 X. Applications of Diamonds in the Electronics Industry and in Instrument Manufacture 193 References 194

CONTENTS Introduction 197 I. General information on the angular divergence of radiation 197 II. Methods of angular selection of radiation 207 Cited literature 213