GRAVITATION, ASTROPHYSICS 
Viscosity effects in isotropic cosmologies

1

A new type of radioactive decay: gravitational annihilation of baryons

9

NUCLEI, PARTICLES, AND THEIR INTERACTIONS 
Effect of target recoil and excitation in bremsstrahlung and pair production processes

12

Twophoton positronKelectron annihilation

17

Elastic scattering of photons in an intense field and the photoproduction of a pair and a photon

23

Unitarity relation and phase shift analysis in a system comprising a resonance and a particle

29

Properties of heavy leptons and their manifestation in the hadrons reaction

32

ATOMS, SPECTRA, RADIATION 
Resonance broadening in a strong light field

38

Excitation of high vibrational states and dissociation of polyatomic molecules in a laser field

47

Effect of coherent radiation on the translational motion of atoms

52

New bands in lowtemperature fluorescence of anthracene crystals at high exciton concentrations

56

PLASMA, GASES 
Measurement of the electron temperature and density distributions in the plasma in the TM3 Tokamak installation by the method of laser radiation scattaring

63

Spatially nonuniform singular weak turbulence spectra

67

Anomalous absorption of electromagnetic waves in a randomly inhomogeneous collisionless magnetoactive plasma

75

Compton effect and pair production for relativistic particles in a plasma

80

Driftkinetic equation for a tenuous plasma in the presence of highfrequency fields

84

Absorption and reflection of laser radiation by a dispersing hightemperature plasma

90

SOLIDS, LIQUID 
Dynamics of electronnuclear spin systems in solids

95

Investigation of the properties of a rotating He^{3}He^{4} solution by the oscillatingdisk method

96

Nonlinear cyclotron resonance in metals

100

Amplification and generation of coherent phonons in ruby under conditions of spinlevel population inversion

106

Dynamic damping of dislocations in ferromagnets

114

The conductivity of a quasionedimensional metal at T=0

118

General theory of thermal fluctuations in nonlinear systems

125

Current fluctuations in semiconductors in the presence of a quantizing electric field

130

Nonlinear helicon resonance in an aluminum plate

135

Quantum oscillations of the magnetic moment in a nonequilibrium system with electronhole pairing

138

Largeamplitude collective oscillations and the double parametric resonance of magnons

143

Anomalies of the heat capacity of neodymium and praseodymium at high temperatures

150

Critical behavior of the Hall coefficient near the percolation threshold

152

Anomalous penetration of an electromagnetic field into a metal with diffuse reflection of electrons by the specimen boundary

156

Dynamics of fluctuations at multicritical points

162

Shock adiabats for ultrahigh pressures

167

Statistical characteristics of the heating of a transparent medium with random absorbing inclusions by laser radiation

172

"Compression" of the electron shell of a neutral atom by a crystal matrix

174

Contribution to the theory of photon spectra in a semiconductor laser

177

Energy spectrum of γ rays passing anomalously through resonantly absorbing Fe^{57} crystals

180

Melting curve of hydrogen up to 10 kbar

182

Equation of state in the critical region with inclusion of nonasymptotic terms

184

Interference nuclear acoustic resonance in crystals with a cooperative JahnTeller effect

187

Magnetic and neutrondiffraction investigations of reorientation transitions in cobaltsubstituted yttrium orthoferrite

192

Threshold piezoelectric instability in a liquid crystal

195
