GRAVITATION, ASTROPHYSICS 
Radiative effects in stochastic acceleration and universal spectra of fast cosmicray particles

631

NUCLEI, PARTICLES, AND THEIR INTERACTION 
Color forces and the cumulative effect in scattering of hadrons by deuterons

640

Effect of magnetic field on the photoproduction of electronpositron pairs

651

Topological effect of fermionpair production enhancement by a nonuniform magnetic field

654

ATOMS, SPECTRA, RADIATION 
Level shifts under the influence of a shortrange potential

657

Radiation emission by quasiclassical electrons in an atomic potential

665

Excitation of a degenerate level + band system by radiation of varying frequency

676

Landaulevel distribution of electrons moving with velocities exceeding that of light in the medium

682

Theory of photon echo produced at resonant levels with hyperfine structure

687

PLASMA, GASES 
Radiative collision generation of sound in gases by singlepulse optical excitation

693

The role of plasma compressibility in the gradient soliton problem

698

LIQUIDS 
Specific heat, entropy, and magnetic susceptibility of liquid He^{3}

704

Investigation of the optical properties of liquid crystals near the point of transition from an isotropic liquid to a nematic liquid crystal

712

Temperature dependence of the interdiffusion coefficient in a CO2Ne solution near the critical
point for vaporization of the solvent

718

Nonlinear dynamics of the director of a nematic crystal in a magnetic field

723

Expanding selfsimilar discontinuities and shock waves in dispersive hydrodynamics

732

Dynamics of superfluid ^{3}He in ^{3}He^{4}He solutions

741

Disclination symmetry in uniaxial and biaxial nematic liquid crystals

748

SOLIDS 
Thermalelectric domains in metal conductors

754

Angular momentum of a Heisenberg ferromagnet with a magnetic dipole interaction

764

Pretransition phenomena at a firstorder structural phase transition

767

Longterm relaxation processes induced by a quantizing magnetic field in the metallic phase of Pb_{1x}Sn_{x}Te(ln) alloys

774

Antiferrornagnet in a strong magnetic field: analogy with Bose gas

781

Anomalous spin magnetoresistance in the region of variablerange hopping conductivity

787

The effect of oxygen impurity on the emission by bound excitons in silicon

793

Multiquantum vibrational transitions upon the resonant tunneling of electrons

795

Influence of phonon dispersion on amplitude solitons and periodic structures in a PeierlsFrohlich system

804

Properties of superconducting SIN, SIS, and SCS structures with amorphous weak coupling

810

Theory of impurity states in a zerogap semiconductor

818

Equations of the GinzburgLandauAbrikosovGor'kov theory for superconductors with a statedensity fine structure; effect of radiation on the upper critical field of Nb_{3}Sn

823

Thermodynamics of phase transitions in systems with polarized point defects

829

Conductivity of twodimensional electrons in a periodic potential in a strong magnetic field

844

Fluctuation effects in macroscopic dynamics of twodimensional ferromagnets

851

Superconducting properties of systems with local pairs

856

Phenomenological description of relaxation processes in magnetic materials

863

Effect of the structure of a crystal and its defects on the relaxation of nuclear spin waves in antiferromagnets

868
