Journal of Experimental and Theoretical Physics 





JETP, Vol. 64, No. 1, July 1986
(Russian original  ZhETF,
Vol. 91,
No. 1
, July 1986)
GRAVITATION, ASTROPHYSICS 
Types of unbound geodesics in the Kerr metric

1

Neutrino oscillations in a variabledensity medium and
ubursts due to the gravitational collapse of stars

4

NUCLEI, PARTICLES, AND THEIR INTERACTION 
Structure of vacuum in chiral supersymmetric quantum electrodynamics

8

Quantum theory of inelastic scattering of negativelycharged particles by oriented crystals

14

Radiochemical search for the decay of uranium233 with the emission of neon124 using a lowbackground semiconductor gammaray spectrometer
A. Ya Balysh, A.A. Gurov, A.V. Demekhin, A.G. Zelenkov, I.V. Kondratenko, B.G. Novatskii, G.A. PikPichak, V.A. Pchelin, Yu. F. Rodionov, L.V. Chistyakov, V.M. Shubko

21

ATOMS, SPECTRA, RADIATION 
Spontaneous radiative alignment of dipole moments of atoms moving in a medium

25

Nonlinear susceptibilities of atoms at frequencies above the ionization threshold

29

Coherent interaction of light with a discrete periodic resonant medium

37

Timedependent Brillouin scattering of an intense polariton wave

45

PLASMA, GASES 
Turbulent conductivity of a magnetoactive plasma

50

Dynamics and radiation emission by particles trapped by an electrostatic wave in a transverse magnetic field

57

Condensation of Alfven waves into vortices in an inhomogeneous plasma

62

LIQUIDS 
Laserinduced generation of subnanosecond sound pulses in liquids

67

Effect of topological constraints on the dynamics of polymer solutions

71

Polarization effects during selffocusing with orientation aberration in nematic liquid crystals

76

SOLIDS 
Scattering of electrons by kinks on the dislocation line of a metal

81

Experiments on mutual diffusion and the behavior of the width of the Rayleigh line near the critical vaporization line in ^{3}He^{4}He solutions

86

Time evolution of a quantized anharmonic oscillator and its spin analogue

90

Selfdefocusing of converging beams: circular "intensity waves" at the focus

96

Electron accommodation during hydrogen atom adsorption on a juvenile surface of a zinc sulfide single crystal

99

Collective modes of incommensurate structures in systems with dipole interactions

110

Nonlinear electromagnetic excitation of ultrasound in metals

117

The formation of laserinduced periodic structures on surfaces of solids

123

Repulsion of energy levels and conductivity of small metal samples

127

Accumulation of the relaxation products of a stationary magnon packet

136

Intrinsic dielectric loss in crystals: Low temperatures

142

Relaxation of paramagnetic impurity centers via host lattice ions in Van Vleck paramagnets

152

Coherence properties and current transport in a ceramic Josephson medium, BaPb_{1x}Bi_{x}O_{3}

159

Surface contribution to the generation of reflected secondharmonic light for centrosymmetric semiconductors

167

Study of dysprosium by a muon diffusion technique
S.G. Barsov, A.L. Getalov, V.G. Grebinnik, I.I. Gurevich, V.A. Zhukov, I.G. Ivanter, B.F. Kirillov, A.I. Klimov, S.P. Kruglov, L.A. Kuz'min, A.B. Lazarev, S.M. Mikirtych'yants, N.I. Moreva, B.A. Nikol'skii, A.V. Pirogov, A.N. Ponomarev, V.A. Suetin, S.N. Shilov, G.V. Shcherbakov

174

Bloch equations in the memoryfunction formalism

181

Oscillatory effects in photostimulated surface reconstruction

183

Effect of level quantization on the lifetime of metastable states

185

Cyclotron resonance in multivalley semiconductors with dislocations

190

Instability due to magnetically induced currents

193

Pointcontact and neutron spectroscopy of ruthenium

200

ERRATA 
Erratum: The threebody problem: generalized exponential expansion, arbitrary states in a correlated basis, and the binding energy of muonic molecules [Sov.Phys. JETP 63,12 (1986)]

206




