GRAVITATION, ASTROPHYSICS 
External fields in the gravitational collapse of rotating masses

1505

The isotropization of the cosmological expansion owing to particle production

1515

NUCLEI, PARTICLES, AND THEIR INTERACTIONS 
Concerning the kinetics of stimulated gamma radiation in the transient regime

1528

ATOMS, SPECTRA, RADIATION 
Intershell and intersubshell effects in photoionization of atoms

1537

Optical and radiative collisions

1550

Determination of allowed states of a multiparticle specified for given states of the subsystems

1560

On the theory of polarization phenomena in the spectroscopy of twoquantum transitions

1570

Parametric relaxation resonance of optically oriented atoms in a transverse magnetic field

1578

The dynamical Stark effect in diatomic molecules

1581

Mixing of degenerate states of an excited hydrogen atom in longrange collisions with a charged particle

1590

The acceleration of atoms by light

1599

PLASMA, GASES 
Stabilization of shock instability at the expense of the inhomogeneity of the medium

1613

Determination of the electron velocity distribution by the Thomson scattering method

1622

A model of turbulence

1626

The propagation of a nonlinear wave in a stochastic medium

1632

Energy distribution of electrons in a weakly ionized currentcarrying plasma with a transverse inhomogeneity

1638

Nonlinear penetration of a plasma by an electromagnetic wave and nondecay mechanisms of its energy dissipation

1651

Laserinduced breakdown in air in a constant electric field

1668

Selfaction of an electromagnetic wave in a plasma upon excitation of parametric instability

1673

Nonlinear theory of thermonuclear Alfven instability in plasma

1686

SOLIDS, LIQUIDS 
Theory of channeling effect, III. Energy losses of fast particles

1693

Magnetic ordering in dilute PdFe alloys

1712

A model of a disordered system (A contribution to the theory of "liquid semiconductors")

1720

Propagation of laserradiation absorption waves in a transparent solid dielectric

1734

Fine structure of the Rayleigh line wing and the propagation of transverse hypersound in liquids

1740

Nonequilibrium state of superconductors with optical excitation of quasiparticles

1755

Ferromagnetic resonance in uniaxial crystals with cylindrical domain structures

1762

Mössbauer observation of radiofrequency striction of the paraprocess in invar alloys

1777

On the reciprocity principle for scattering of fast charged particles by crystals

1783

Determination of the sign of the g factor and observation of deformation of epitaxial films in the transverse effect of optical orientation in semiconductors

1790

Investigation of the magnetic properties and NMR in spinreorientation transitions in DyFe_{0.998}Co_{0.02}O_{3} crystals

1798

Frequency dependence of the conductivity of random systems near the true spectral edge

1806

Magnetic dipole forces and critical dynamics of ferromagnets above the Curie point

1809

Magnetic phase transition in yttrium orthovanadite

1823

Oscillations of the elastic parameters of compressed matter

1828

Sound absorption in an antiferromagnet in the vicinity of a spinflop field

1844

Antiferromagnetic resonance in FeBO_{3}

1847

Fluctuation conductivity of superconductors of the second kind above T_{c} in the presence of strong electric and magnetic fields

1862

Observation of paramagnetic resonance on an Fe^{2+} ion in a CaCO_{3} lattice

1870

A general method for integration of manypoint ring diagrams for Fermi systems

1877
