Explosion Showers Produced by HighEnergy Cosmic Ray Particles

265

Asymmetry in the Angular Distribution of Decay Electrons Observed in Photographic Emulsions

280

Hyperfragments in Nuclear Emulsions

286

Study of HighEnergy NuclearActive Particles with Ionization Chambers

298

Production of Pions by Negative Pions on Hydrogen near the Threshhold

301

Distribution of Magnetic Induction in the Intermediate State of a CurrentCarrying Superconductor

312

Mass Distribution of Fission Products from the Irradiation of Gold and Uranium by Nitrogen Irons

316

The Scattering of μ Mesons in Beryllium

322

Isotope Separation in Nonstationary Molecular Flow

327

Investigation of Gamma Rays Emitted in U^{235} Fission Induced by 2.8 and 14.7 Mev Neutrons

331

Angular Distributions for Some (d, p) Reactions

334

Fission of Rotating Nuclei

341

On the Theory of Thermal Excitation of Polarons

346

Effect of Inhomogeneities of the Crystal Lattice on the Thermodynamics of a Gas of Quasi Particles in the Crystal

355

Role of Lattice Thermal Conductivity in the Phenomenological Theory of Paramagnetic Relaxation

371

Use of Collective Variables and Treatment of ShortRange Forces in the Theory of a System of Charged Particles

379

Theory of the Maser and Maser Fluctuations

390

Hole Bands in NaCl Type Crystals

394

On the Scattering of XRays and Thermal Neutrons by SingleComponent Crystals near PhaseTransition Points of the Second Kind

405

On the Theory of Ferromagnetic Superconductors

412

Application of the Methods of Quantum Field Theory to a System of Bosons

417

EnergySpectrum of a Nonideal Bose Gas

433

Scattering of Ions by Atoms

447

Application of Dispersion Relations to π  N Scattering at Low Energies

453

Transition between Hyperfine Structure Levels in μMesic Hydrogen

463

Some Remarks on a Compound Model of Elementary Particles

469

On the Polarization of the Cerenkov Radiation from a Fast Particle Carrying a Magnetic Moment

477

Glow of Air During a Strong Explosion, and the Minimum Brightness of a Fireball

483

Some Optical Effects of Plasma Oscillations in a Solid

494

LETTERS TO THE EDITOR 
The Measurement of the Spectra of Fission Neutrons from U^{233}, U^{235} and Pu^{239} in the 50700 Kev Range

501

Systematics of the Average Number
u of Prompt Fission Neutrons

503

On the Double BetaDecay of Ca^{48}

505

Method of Measuring Particle Energies above 10^{11} Ev

506

Collective Motions in a System of QuasiParticles

508

Creation of Positive Pions by Negative Pions

510

Rotation of a Plasma

512

Fine Structure and Hyperfine Structure of Paramagnetic Resonance of Cr^{+++} in Synthetic Ruby

513

Energy Spectrum of Electrons in Open Periodic Trajectories

515

Lateral Distribution of Photons near the Axis of Extensive Atmospheric Showers

516

Contributions to the Theory of Dispersion Relations

518

Adhesion of Slow Molecules to SF_{6} and CCl_{4} Molecules

519

Quantum Yield of Internal Photoeffect in Germanium

521

On the QuantumKinetic Equation for a System of Charged Particles of Many Kinds

523

The Magnetic Susceptibility of a Uniaxial Antiferromagnetic

524

Phase Indeterminacies in NucleonNucleon Scattering

526

Resonance Absorption of Electromagnetic Waves by an Inhomogeneous Plasma

528

Recombination Capture of Minority Carriers in Ntype Germanium by Lattice Defects Formed upon Irradiation by Fast Neutrons

530

Angular Distribution of μ^{+} Mesons from π  μ Decay

531

Concerning the Letter by P. V. Vavilov, "The Interaction Cross Section of Pi Mesons and Nucleons at High Energies"

533

Measurement of the Velocity of Sound in Liquids under Pressure up to 2500 Atmospheres by an Optical Method

534

Correction to Article "Fluctuation in Collision of High Energy Particles" [J. Exptl. Theoret. Phys. (U.S.S.R.) 29, 296 (1955)]

536
