GRAVITATION, ASTROPHYSICS 
Bounds on inflationary models of the universe

673

Relativistic electromagnetic gas dynamics

677

NUCLEI, PARTICLES, AND THEIR INTERACTION 
Finalstate interaction of β electrons and related phenomena

686

Catalysis of nuclear reactions in hydrogen in a strong magnetic field

693

Lifetime hierarchy of charmed and beautiful hadrons

698

Triplet pairing in nuclei

706

ATOMS, SPECTRA, RADIATION 
Manifestation of quadrupole hyperfine interaction and of interlevel interaction in the optical spectrum of the LiYF_{4}:Ho crystal

716

Features of nonlinear IR absorption of (CF_{3})_{3}CBr molecules at vibrational excitation levels exceeding the dissociation energy

721

Multiphoton absorption in semiconductors at submillimeter wavelengths

729

Nonlinear conversion of cw radiation in waveguide lasers under conditions of stimulated light scattering

738

Interaction between two excited hydrogen atoms at large separations

745

Coulomb broadening of nonlinear resonances in optical spectra of ions

750

Vortical combination resonances

756

Temporal and correlation properties of echo signals in two and threelevel systems under conditions of inhomogeneous broadening of resonant energy levels

761

Nonrelativistic electrons in the field of two strong electromagnetic waves

769

PLASMA, GASES 
Quasiclassical theory of threedimensional wave collapse

773

Physical meaning of solutions with outgoing sound waves in the theory of shockwave stability

781

LIQUIDS 
Behavior of an axisymmetric shock wave near a cumulation point

784

Nonlocal polarizability of water and hydratation interaction between lipid membranes

787

Domain structure in a normally oriented nematic liquid crystal layer under the action of lowfrequency shear

793

Nonlinear interaction of pulsed and noise signals in nondispersive media

797

Propagation of heat pulses generating quantized vortices in He II

803

Binary reaction in one dimension

811

SOLIDS 
Crltlcal behavior of Sn_{2}P_{2}(Se_{x}S_{1x})_{6} uniaxlal ferroelectrlcs near the Lifshitz point

816

Kinetic properties of twodimensional ferromagnets

820

Effective conductivity of strongly inhomogeneous media near the percolation threshold

828

LEED and Auger electron spectroscopy study of the Si(111)2x1+Ag overlayer system in the temperature range 8300 K and coverage range θ=020 monolayers

832

Topologically nontrivial loop defects in condensed media

841

Band structure change in the transition from the cubic to the tetragonal phase in singledomain SrTiO_{3} determined from twophoton absorption spectra

846

Domain walls in JahnTeller crystals with competing structural and magnetic ordering

851

Theory of dynamicalsoliton relaxation in ferromagnets

857

The growth dynamics of a quantum crystal

864

Selfoscillation regime of domainwall generation in a ferrimagnet

874

Photonuclear magnetism of silicon in weak magnetic fields

881

Effect of electronelectron collisions on the trapping of free carriers by shallow impurity centers in germanium

889

Spin packets and spectral diffusion in a magnetically dilute system with a dipole interaction

898

Dynamics of phase slip center of chargedensity wave

906
