DTIC ADA360528: JPRS Report, Science & Technology USSR: Physics & Mathematics.

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JPRS-UPM-91-001
9 JANUARY 1991
JPRS Repor
Science &
Technology
USSR: Physics & Mathematics
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Science & Technology
USSR: Physics & Mathematics
JPRS-VPM-9l-ooi CONTENTS 9 JANUARY mi
Acoustics
Structure of Turbulent Mixing Zone at Gas-Gas Boundary Accelerated by Shock Waves
Ye.Ye. Meshkov, V. V. Nikiforov, et al; FIZIKA GORENIYA I VZRYVA, Vol 26 No 3, May-Jun 90] 1
Interaction of Spherical Shock Waves and Thermal Gas Inhomogeneities Near Surface
[V.A. Andrushchenko, M. V. Meshcheryakov; FIZIKA GORENIYA I VZRYVA, Vol 26 No 3,
May-Jun 90] ^ 1
Dynamic Structures of Dislocation Dipoles Formed by Ultrasonic Action
[N.A. Tyapunina, A.L. Lomakin, et al.; FIZIKA TVERDOGO TELA, Vol 32 No 4, Apr 90] 1
Development of Optical Breakdown in Shock-Compressed Air
[A.P. Budnik, A.G. Popov; TRUDY INSTITUTA EKSPERIMENTALNOY METEOROLOGII: OPTIKA
ATMOSFERY, SERIYA FIZIKA NIZHNEYATMOSFERY', Vol 49(139), 1989] 2
Evolution of Shock Waves and Duration of Phase Transition Process in Armco Iron
[B.I. Gromov, M. V. Yerofeyev, et al; PISMA V ZHURNAL TEKHNICHESKOY FIZIKI, 26 May 90] .. 2
Characteristics of Nonaxisymmetrc Ejections From Superhigh-Speed Impact Craters
[E. M. Drobyshevskiy, B. G. Zhukov, et al.; PISMA V ZHURNAL TEKHNICHESKOY FIZIKI,
26Jun90] 3
Diamagnetism of Nonequilibrium Semiconductor Plasma
[V. N. Podshivalov, V. V. Masalov; PISMA V ZHURNAL TEKHNICHESKOY FIZIKI, 26 Jun 90] 3
Crystals, Laser Glasses, Semiconductors
Reflection of Infrared Radiation by Bi-Sr-Ca-Cu-O Single Crystals and Their Magnetic Susceptibility
[V.L. Arbuzov, O.M. Bakunin, et al.; FIZIKA NIZKIKH TEMPERATUR, Vol 16 No 3, Mar 90] 4
Phase Transition in Lamellar TiS Crystals
2
[G. V. Lashkarev, A. V. Brodovoy, et al.; FIZIKA TVERDOGO TELA, Vol 32 No 4, Apr 90] 4
Inversion of Magnetic Field and Vortex Chain in Anisotropie Superconductors
[A.M. Grishin, A.Yu. Martynovich, et al.; ZHURNAL EKSPERIMENTALNOY I TEORETICHESKOY
FIZIKI, Vol 97 No 6, Jun 90] 4
Radiation Emission by Electron-Hole Droplets or Laser Effect in Si Crystals
[A.A. Kipen; UKRAINSKIY FIZICHESKIY ZHURNAL, Vol 35 No 6, Jun 90] 5
Intense Cooling of Electrons in Nonuniformly Doped Semiconductors
[Yu.G. Gurevich, V.L. Zozulya, et al.; UKRAINSKIY FIZICHESKIY ZHURNAL, Vol 35 No 6,
Jun 90] : 5
X-Ray Photoelectron Spectra of As (GeS ) o Films and Local Coordination of Atoms
x 2 10 x
[Yu.Yu. Babinets, O.Yu. Gorkun, et al; UKRAINSKIY FIZICHESKIY ZHURNAL, Vol 35 No 4,
Apr 90] 6
Transient Photocurrents in Corona-Charged Polytetrafluoroethylene Electrets Exposed to Ultraviolet
Light
[S.N. Fedosov, A.Ye. Sergeyeva; IZVESTIYA VYSSHIKH UCHEBNYKH ZAVEDENIY: FIZIKA,
Vol 33 No 6, Jun 90] 6
Electrophysical Properties of ZnS Films Produced by Magnetron Sputtering
[P.I. Antonenko, Sh.M. Abdarshitov, et al; IZVESTIYA VYSSHIKH UCHEBNYKH ZAVEDENIY:
FIZIKA, Vol 33 No 6, Jun 90] 7
Abnormal Electron Instability of Uniaxially Compressed Polymers
[A. N. Lachinov, A. Yu. Zherebov, et al; PISMA V ZHURNAL EKSPERIMENTALNOY I
TEORETICHESKOY FIZIKI, 25 Jul 90] 7
Fluid Dynamics
Nucleation on Clusters During Phase Transitions of First Kind in Liquid Solutions
[S.F. Rastopov, A.T. Sukhodolskiy; PISMA V ZHURNAL EKSPERIMENTALNOY I
TEORETICHESKOY FIZIKI, 25 May 90] 8
JPRS-UPM-91-001
9 JANUARY 1991 2 USSR: Physics & Mathematics
Thermodynamic Method of Calculating Fractal Dimensionality of Surface
[A.V. Neymark; PISMA VZHURNAL EKSPERIMENTALNOY1 TEORETICHESKOYFIZIKI,
25 May 90] 8
Superradiative Phase Transition in Semiconductors and Semimetals
[V.A. Borisyuk; ZHURNAL EKSPERIMENTALNOY 1 TEORETICHESKOY FIZIKI, Vol 97 No 6,
Jun 90] 8
On the Possibility of Deuteron Superfluidity Associated With Hydrogen Dissolution in Metals
[A. M. Kosevich; FIZIKA NIZKIKH TEMPERATUR, Vol 16 No 7, Jul 90] 9
Lasers
Emission Characteristics of Continuous-Wave CO-Laser With Longitudinal Electric-Discharge
Excitation and Cryogenic Cooling
[G.M. Grigoryan, B.M. Dymshits, et al; KVANTOVAYA ELEKTRONIKA, Vol 17 No 6, Jun 90] 10
Regenerative Amplification of Narrow-Band Radiation in XeCl* Excimer Laser
[M.S. Dzhidzhoyev, S.V. Dolgiy, et al; KVANTOVAYA ELEKTRONIKA, Vol 17No 6, Jun 90] 10
Role of Multistage Collisions of Second Kind in Ionic Mercury Laser
[D.A. Korogodin, Ye.L. Latush, et al; KVANTOVAYA ELEKTRONIKA, Vol 17No 6, Jun 90] 11
Nonlinear Fiber-Optic Reflector for Passive Mode Locking
[A.G. Bulushev, Ye.M. Dianov, et al.; KVANTOVAYA ELEKTRONIKA Vol 17No 6, Jun 90] 11
Generation of Microwaves in Plasma of Optical Breakdown Induced by Modulated Laser Radiation
[A.A. Antipov, A.Z. Grasyuk, et at; KVANTOVAYA ELEKTRONIKA, Vol 17No 6, Jun 90] 11
Current Generation and Plasma Front Propagation Induced by Action of Two Laser Pulses on Target in
Air [E.M. Barkhudarov, G.V Gelashvili; KVANTOVAYA ELEKTRONIKA, Vol 17No 6, Jun 90] 12
Tunable Single-Frequency XeCl* Excimer Laser
[M.S. Dzhidzhoyev, S. V. Krayushkin, et ai; KVANTOVAYA ELEKTRONIKA, Vol 17No 5, May 90] ... 13
Tunable Narrow-Band XeCl* Excimer Laser
[I.A. Kudinov, V.T. Platonenko, et ai; KVANTOVAYA ELEKTRONIKA, Vol 17 No 5, May 90] 13
Comparative Evaluation of Yal0 :Nd3+ and YAG:Nd3+ as Active Media for Compact Periodically
3
Pulsed Laser With Stimulated-Mandelshtam-Brillouin-Scattering Mirror
[P.P. Pashinin, V.S. Sidorin, et al.; KVANTOVAYA ELEKTRONIKA, Vol 17No 5, May 90] 13
Theory of Transient Ablation of Polymers by Ultrashort Laser Pulses
[N.P. Furzikov; KVANTOVAYA ELEKTRONIKA, Vol 17 No 5, May 90] 14
Monokinetization of Atom Beams by Laser-Induced Photodetachment of Electron
[L.A. Rivlin; KVANTOVAYA ELEKTRONIKA, Vol 17 No 5, May 90] 14
General-Purpose Tunable Laser
[Yu.I. Baranov, N.I. Sizov; TRUDYINSTITUTA EKSPERIMENTALNOYMETEOROLOGII: OPTIKA
ATMOSFERY, SERIYA 'FIZIKA NIZHNEY ATMOSFERY', Vol 49 (139), 1989] 15
Impulse Generation of a C0 Laser With Controllable V0 Mirror
2 2
[N.F. Bochorishvili, Yu.M. Gerbshteyn, et al; PISMA V ZHURNAL TEKHNICHESKOY FIZIKI,
26 May 90] 15
Possibility of Contracting Emission Pulses by Cooperative Effect in Semiconductor Lasers With External
Cavity [V.A. Yurevich; PISMA V ZHURNAL TEKHNICHESKOY FIZIKI, 26 May 90] 16
Initial Stages of GaAs Surface Fusion Under Femtosecond Laser Pulses: A Study by the Second
Harmonic Generation Method
[S. V. Govorkov, I. L. Shumay, et al; PISMA V ZHURNAL EKSPERIMENTALNOY I
TEORETICHESKOY FIZIKI, 25 Jul 90] 16
Model for Describing Emission of Short-Lived Amplifying Media
[M. Ya. Amusya; PISMA V ZHURNAL TEKHNICHESKOY FIZIKI, 26 Jun 90] 16
Nuclear Physics
Annihilation of Superradiation in Systems of Positronium Atoms
[R.A. Vlasov, O.N. Gadomskiy, et al; DOKLADY AKADEMII NAUK SSSR, Vol 311 No 5, Apr 90] 17
Estimating Constituent Mass of Light Quark by Rules-of-Sums Method
[A.A. Pivovarov; YADERNAYA FIZIKA, Vol 51 No 6, Jun 90] 17
Threshold Effect in Processes Involving Emission of Lepton Pairs From Quark-Gluon Plasma
[M.I. Gorenshteyn, O.A. Mogilevskiy; YADERNAYA FIZIKA, Vol 51 No 6, Jun 90] 17
Strong Selectivity and Dependence of Maximum Ion Energy on Charge Number During Acceleration of
Ions in Electron Beams
[A.A. Kansuzyan, A.A. Plyutto, et al; PISMA V ZHURNAL TEKHNICHESKOY FIZIKI, 12 Apr 90] ... 17
JPRS-UPM-91-001 „ „ .
iTOO
9 JANUARY 1991 3 USSR: Physics & Mathematics
Total Cross-Section for Radiative Electron-Ion Recombination
[A.l. Milshteyn; ZHURNAL EKSPERIMENTALNOY I TEORETICHESKOY FIZIKI, Vol 97 No 6,
Jun 90] 18
Superradiance in System of Proton Spins
[N.A. Bazhanov, D.S. Bulyanitsa, et al; ZHURNAL EKSPERIMENTALNOY I TEORETICHESKOY
FIZIKI, Vol 97 No 6, Jun 90] 18
Sound Pulses Within Light Beam in Weakly Absorbing Medium. Paraxial Buildup of Sound and
Refraction of Light
[G.A. Askaryan, A.G. Krasnovskiy, et al, ZHURNAL EKSPERIMENTALNOY I TEORETICHESKOY
FIZIKI, Vol 97 No 6, Jun 90] !9
Nonlinear Dynamics and Solitons in Spin Glasses
[Yu.A. Beletskiy, B.A. Ivanov, et al.; TEORETICHESKAYA IMATEMATICHESKAYA FIZIKA, Vol 83
No 2, May 90] : 19
Relativistic Coulomb Quasi-Potential and New Narrow Resonances in Systems of Charged Particles
[B.A. Arbuzov, E.E. Boos, et al.; TEORETICHESKAYA I MATEMATICHESKAYA FIZIKA, Vol 83
No 2, May 90] 20
Soliton Dynamics in Constant Magnetic Field
[L.S. Brizhik; TEORETICHESKAYA I MATEMATICHESKAYA FIZIKA, Vol 83 No 3, Jun 90] 20
Production of Superheavy Hydrogen Isotopes During Absorption of TC" Mesons by 6,7Li Nuclei
[A.I. Amelin, M.G. Gornov, et al; PISMA V ZHURNAL EKSPERIMENTALNOY I
TEORETICHESKOY FIZIKI, 25 Jun 90] 20
New Adiabatic Invariants in Problem of Two Hydrogen Atoms Far Apart
[A.A. Belov, Yu.Ye. Lozovik; PISMA V ZHURNAL EKSPERIMENTALNOY I TEORETICHESKOY
FIZIKI, 25 Jun 90] 21
Method of Determining Half-Life
[V.Ye. Makarenko, G.A. Otroshchenko; YADERNAYA FIZIKA, Vol 51 No 5, May 90] 21
Describing Cross-Section for Fission of Transuranium Nuclei by Fast Neutrons
[A.V. Ignatyuk, V.M. Maslov; YADERNAYA FIZIKA, Vol51 No 5, May 90] 21
New Method of Determining Mass of Light Nuclides and Quantum Characteristics of Corresponding
Nuclei [I.V. Polavskiy; YADERNAYA FIZIKA, Vol 51 No 5, May 90] 22
Experimental Study of Mass and Energy Distributions of Fission Fragments From Excited Nuclei With
Z2/A =33-42 [M.G. Itkis, S.M. Lukyanov, et al.; YADERNAYA FIZIKA, Vol 52 No 1(7), Jul 90] 22
Search for Superheavy Magnetic Monopoles in Deep-Water Experiments on Lake Baikal
[L.B. Bezrukov, I.A. Belolaptikov, et al.; YADERNAYA FIZIKA, Vol 52 No 1(7), Jul 90] 22
Physics of Dark Matter in Universe According to Theory of Broken Generational Symmetry
[Z.G. Berezhiani, M.Yu. Khlopov; YADERNAYA FIZIKA, Vol 52 No 1(7), Jul 90] 23
Mass Hierarchy of Fermion Generations
[I.T. Dyatlov; YADERNAYA FIZIKA, Vol 52 No 1(7), Jul 90] 23
Anomalous Magnetic Moment of Electron and Synchrotron Radiation
[I.M. Ternov, V.A. Bordovitsyn, et al; IZVESTIYA VYSSHIKH UCHEBNYKH ZAVEDENIY: FIZIKA,
Vol 33 No 6, Jun 90] 24
New Method of Recording Photoionization of Oriented Molecules
[A.V. Golovin, V.V. Kuznetsov, et al; PISMA VZHURNAL TEKHNICHESKOYFIZIKI, 26 May 90] . 24
Quantum-Chromodynamical Parametrization for Structural Deep-Inelastic-Scattering Functions
[V.l. Vovk, A. V. Kotikov, et al.; TEORETICHESKAYA I MATEMATICHESKAYA FIZIKA, Vol 84
No 1, Jul 90] 24
Optics, Spectroscopy
Parameters of Optical Waveguides on LiNb0 :Ti or LiTa0 and Their Dependence on Composition of
3 3
Crystal [V.V. Atuchin, K.K. Ziling; ZHURNAL TEKHNICHESKOY FIZIKI, Vol 60 No 4, Apr 90] .... 25
Theory of Planar Waveguide as Separator of Spectral Channels
[A.S. Starkov; ZHURNAL TEKHNICHESKOY FIZIKI, Vol 60 No 4, Apr 90] 25
Phase Modulation and Mode Coupling in Dual-Mode Optical Fibers
[O.I. Kotov, O.L. Marusov, et al.; PISMA V ZHURNAL TEKHNICHESKOY FIZIKI, 12 Apr 90] 25
Behavior of Effective Charges in Curved Space With Boundaries
[S.D. Odintsov; UKRAINSKIY FIZICHESKIY ZHURNAL Vol 35 No 5, May 90] 26
Nonreciprocal Optical Effect in Interaction of Light and Traveling Permittivity Wave
[G.Ye. Zilberman, L.F. Kupchenko, et al.; UKRAINSKIY FIZICHESKIY ZHURNAL, Vol 35 No 5,
May 90] 26
JPRS-UPM-91-001
9 JANUARY 1991 4 USSR: Physics & Mathematics
Spectra of New Series of Ferroelectric Liquid Crystals: Esters of Diphenylcarbonic Acid
fT.P. Myasnikova, N.I. Chernova, et al; UKRAINSKIY FIZICHESKIY ZHURNAL, Vol 35 No 5,
May 90] 26
Propagation of Light Soliton During Adiabatic Tracking at One-Photon Resonance
[V.D. Gora; KVANTOVAYA ELEKTRONIKA, Vol 17 No 6, Jun 90] 27
Formation of Reflecting Surface of Adaptive Mirror Conjugate to Wavefront Distortions
fV.V. Apollonov, Ye.A. Ivanova, et al; KVANTOVAYA ELEKTRONIKA, Vol 17No 6, Jun 90] 27
Convective Stability of Superfluid 3He-4He Solution
[A.P. Grigin; ZHURNAL EKSPERIMENTALNOYI TEORETICHESKOY FIZIKI, Vol 97 No 6,
Jun 90] 28
Pulse Compression and Effective Reflection Coefficient During Stimulated Backscattering
[A.P. Vinnichenko, V.l. Kislenko; UKRAINSKIY FIZICHESKIY ZHURNAL, Vol 35 No 4, Apr 90] 28
Electromagnetic Wave Intensity Probability Distribution in Area of Wide Fluctuations
[R. Kh. Almayev, A. A. Suvorov; PISMA V ZHURNAL EKSPERIMENTALNOY I
TEORETICHESKOY FIZIKI, 25 Jul 90] 28
Photostimulated Gyrotropism and Photostimulated Light Scattering in As S 3 Chalcogenide Glass
2 3
[V. M. Lyubin, V. K. Tikhomirov; PISMA V ZHURNAL EKSPERIMENTALNOY I
TEORETICHESKOY FIZIKI, 25 Jul 90] 28
Plasma Physics
Speed of Nuclear Reactions With Anisotropie Distribution of Interacting Particles
[VS. Imshennik; FIZIKA PLAZMY Vol 16 No 6, Jun 90] 30
Density Solitons and Current Limitation in Electron Beam Current
[B.N. Rutkevich, S.B. Rutkevich; FIZIKA PLAZMY, Vol 16 No 6, Jun 90] 30
Modulation Instability and Formation of Soliton at Ion-Ion Hybrid Resonance Frequency
[T.A. Davydova, V.M. Lashkin; UKRAINSKIY FIZICHESKIY ZHURNAL, Vol 35 No 4, Apr 90] 30
Wide-Range Equation of State for Water
[A.M. Belyayev, VS. Vorobyev, et al.; TEPLOFIZIKA VYSOKIKH TEMPERATUR, Vol 28 No 3,
May-Jun 90] 31
Dielectric Anomaly of Mercury Near Critical Point
[A.A. Likalter; TEPLOFIZIKA VYSOKIKH TEMPERATUR, Vol 28 No 3, May-Jun 90] 31
Evolution of Structure and Parameters of Plasma Jet After Pulsed Plasma Injection Into Atmosphere
[A.P. Yershov, LB. Timofeyev, et al; TEPLOFIZIKA VYSOKIKH TEMPERATUR Vol 28 No 3,
May-Jun 90] 31
Superconductivity
Effect of Dielectrization of Electronic Spectrum on Critical Current in BaPb,. Bi 0 Josephson
x x 3
Materials
[A.I. Voytenko, A.M. Gabovich, et al; FIZIKA NIZKIKH TEMPERATUR Vol 16 No 3, Mar 90] 33
Photocurrent in Tunnel Junction Between High-Tc Superconductor and Degenerate Semiconductor
[V.N. Alfeyev, L.N. Neustroyev; DOKLADY AKADEMIINA UK SSSR, Vol 311 No 5, Apr 90] 33
New Exact Solution to Einstein's Equations for Gravitational Field of Stationary Axisymmetric Mass
[VS. Manko, Sh.A. Khakimov; PISMA V ZHURNAL EKSPERIMENTALNOY I TEORETICHESKOY
FIZIKI, 25 May 90] 33
Change in Characteristics of Superconducting Transition in Y-Ba-Cu-0 System Under Mechanical Load
[T.S. Orlova, B.I. Smirnov, et al; FIZIKA TVERDOGO TELA, Vol 32 No 4, Apr 90] 34
Observing Penetration of Abrikosov Vortices Into Superconducting Nb Films With Aid of Josephson
Tunnel Junction
[V.N. Gubankov, M.P. Lisitskiy, et al; PISMA V ZHURNAL EKSPERIMENTALNOY I
TEORETICHESKOY FIZIKI, 25 Jun 90] 34
Second Sound in Superfluid He-3 in He-4 Solutions
[I.N. Adamenko, K.E. Nemchenko, et al; FIZIKA NIZKIKH TEMPERATUR, Vol 16 No 6, Jun 90] .... 35
Possible Realization of High-Temperature Superconductivity in Semiconductors
[Yu.A. Bumay, LG. Gorolchuk, et al; FIZIKA NIZKIKH TEMPERATUR Vol 16 No 6, Jun 90] 35
Effect of Electromagnetic Radiation on Transient Characteristics of Superconducting Channels
[G.Ye. Churilov, D.A. Dikin, et al; FIZIKA NIZKIKH TEMPERATUR, Vol 16 No 6, Jun 90] 36
Isotope Effect in Model of Superconductor With Structural Phase Transition
[N.M. Plakida, A.Yu. Chernyy; TEORETICHESKAYA IMATEMATICHESKAYA FIZIKA, Vol84
No 1, Jul 90] 36
T and Rhombic Distortions in Hubbard's High-T Superconductor Model
c c
[V A. Ivanov, M. Ye. Zhuravlev; FIZIKA NIZKIKH TEMPERATUR, Vol 16 No 7, Jul 90] 37
9j5«JARY 19M 5 USSR: Physics & Mathematics
Impulse Studies of Resistive Phase in Bulk Ti,. V Superconductors; Metastable Current States
x x
[A. F. Perekul, A. B. Rolshchikov, et al; FIZ1KA NIZKIKH TEMPERATUR, Vol 16 No 7, Jul 90] 37
Theoretical Physics
Unambiguity of Predictions Based on General Theory of Relativity
[J.A. Ferrari; TEORETICHESKAYA IMATEMATICHESKAYA FIZIKA, Vol 83 No 3, Jun 90] 38
Differential Equations
Solvability of Boundary-Value Problems for Certain Systems of Differential Equations
[V.A. Malovichko; UKRAINSKIYMATEMATICHESKIY ZHURNAL, Vol 42 No 5, May 90] 39
Group Theory, Combinatorics
Groups With Minimax Factor-Groups ,„..,,,
r
[L.A. Kudrachenko, V.V. Pylayev; UKRAINSKIY MATEMATICHESKIY ZHURNAL, Vol 42 No 5,
May 90] 40
JPRS-UPM-91-001
09 JANUARY 1991 Acoustics
UDC 532.23 analyzed in the two-dimensional axisymmetric approxi-
mation, considering that a laser-induced breakdown
Structure of Turbulent Mixing Zone at Gas-Gas occurs at some given altitude H above a thermally
Boundary Accelerated by Shock Waves insulated rigid plane surface. The corresponding system
907J0075 Novosibirsk FIZIKA GORENIYA I VZRYVA of Navier-Stokes equations in dimensionless gas vari-
in Russian Vol 26 No 3, May-Jun 90, pp 71-77 ables and cylindrical coordinates are solved for three
different boundary-value problems, the first one
[Article by Ye.Ye. Meshkov, V.V. Nikiforov, and A.I. involving a homogeneous thermal layer of uniform
Tolshmyakov, Moscow] thickness h' on the surface. The second problem involves
[Abstract] An experimental study was conducted concerning a homogeneous cold layer of uniform thickness h' on the
the turbulent mixing zone at the boundary between two surface. The third problem involves a circular layer of
gases of different densities, this boundary being accelerated gas within the range of the laser beam and uniformly
by successive steady shock waves in a wind tunnel. Shock heated by the latter at an altitude h' above the surface.
waves were passed through a channel consisting of three The system of Navier-Stokes partial differential equa-
compartments in a row each with transparent lateral walls. tions is replaced with an approximating system of differ-
Two thin organic film, each having a specific mass of 30-40
ence equations, the latter being split with respect to
gm/cm2, their planes perpendicular to the direction of shock
coordinates and functions according to an implicit
wave propagation, separated the middle compartment con-
scheme of second-order accuracy which has been stabi-
taining air with tobacco smoke from both the first compart-
lized by damping. Calculations were made on a Standard
ment containing pure air and the last compartment con-
taining helium. The exit from that 169 mm long last System 1055 computer,using a 201 x 61 grid. Analysis of
compartment was closed with a stopper made of acrylic the interaction based on numerical solution for seven
glass and acting as a rigid wall. The film separating air with sets of initial conditions reveals that a thermal gas layer,
smoke from air with helium was accelerated by shock waves having a discontinuous upper boundary, splits a
propagating at a velocity of Mach M = 1.3, accelerated and reflected shock wave into one which proceeds toward the
decelerated by shock waves, returning after reflection by the primary heat source and one which returns to the epi-
rigid stopper. The turbulent mixing zone forming at the center. The substrate surface in this case reflects shock
air-helium boundary was observed visually and photo-
waves in the regular mode when their angle of incidence
graphed, a light beam emitted by a laser in pulses of 40 ns
is small or in the Mach mode as the critical angle is
duration transformed by cylindrical lenses into a knife edge
reached and exceeded. A cold gas layer decelerates
of light and the latter passed through the transparent rigid
incident shock waves and delays the transition from
stopper into the channel. Smoke particles present in the air,
and so small as to virtually adhere to it, scattered the light regular to Mach reflection. A shock wave entering a
forming an image of the smoke pattern and also of the air circular hot gas layer above the surface splits into one
density distribution in the mixing zone. A densitometric which continues propagating in the same direction and a
wedge was simultaneously photographed for reference, a rarefaction wave which moves in the opposite direction.
part of the laser beam having been diverted by a semitrans- This gives rise to a buildup of a rather large low-pressure
parent plane mirror into a Ragulskiy wedge formed by region along the vertical axis of symmetry, the denser gas
another semitransparent, opaque plane mirror. The speckle around and above that layer eventually rushing toward
structure of the image was eliminated by a scattering filter of
that axis and generating a secondary shock wave of
milk glass. The photographs have been processed so as to
cumulative origin. Figures 5; tables 2; references 12.
reveal the air density distribution on the basis of light
intensity distribution. The results are analyzed and inter-
preted from the standpoint of gas flow theory, air containing
smoke being treated as a two-phase gaseous medium. The UDC 539.2
adaptability of its particles to prevailing conditions is char-
acterized by a parameter which has the dimension of length
and has been introduced as a new criterion in addition to Dynamic Structures of Dislocation Dipoles
the Reynolds number. Figures 5; references 8. Formed by Ultrasonic Action
907J0083C Leningrad FIZIKA TVERDOGO TELA
UDC 533.6.011.72 in Russian Vol 32 No 4, Apr 90 pp 1097-1101
Interaction of Spherical Shock Waves and
Thermal Gas Inhomogeneities Near Surface
[Article by N.A. Tyapunina, A.L. Lomakin, and Kh.
907J0075B Novosibirsk FIZIKA GORENIYA I Khristu, Moscow State University imeni M.V.
VZRYVA in Russian Vol 26 No 3, May-Jun 90 Lomonosov, Moscow]
pp 77-82
[Article by V.A. Andrushchenko and M.V. Meshcherya- [Abstract] Structural changes in solids effected by peri-
kov, Moscow] odic action of ultrasound, specifically translatory move-
ments of dislocations, are analyzed theoretically on the
[Abstract] Interaction of spherical shock waves gener-
basis of computer experiments, a laboratory study of this
ated during optical breakdown with thermal gas inhomo-
geneities produced by the external radiation source is process not being feasible. As model has been selected a
JPRS-UPM-91-001
Acoustics 09 JANUARY 1991
dipole of infinitely long straight edge dislocations par- components (N , 0 , N, O, NO, NO+, e) is described by
allel to the OZ axis with a Burgers vector along the OX 2 2
a system of seven nonlinear equations of kinetics
axis moving in the XZ plane of easy slip. The equation of involving seven reaction rate constants, assuming that
motion in the quasi-viscous and non-inertial approxima- the air density and temperature behind the shock wave-
tion, valid at kilohertz frequencies, includes a term
front remain constant. Development of an electron ava-
representing movement of dislocations dependent on lanche is accounted for by adding the two reactions N +
2
both amplitude and frequency of the ultrasound and a e _ N " + 2e and 0 + e -^ 0 " + 2e with the
2 2 2
term representing movement of dislocations due to their corresponding reaction rate constants. A numerical solu-
interaction. The latter term appears as the sum of all
tion of this system has yielded the temperature-time
interaction forces F*> (i not equal to j) minus the
dependence of electron concentration and the rate con-
threshold or starting force, those forces varying in space stants of all seven forward and seven reverse reactions
and in time as the distance between dislocations varies. behind the shock wavefront in hot air after optical
The computer experiments reveal various possible com- breakdown. Figures 1; tables 1; references 4.
plex patterns of dislocation behavior and resulting
dynamic dipole structures under an ultrasonic load,
quite different from those under a static load and only a Evolution of Shock Waves and Duration of Phase
weak ultrasound of small amplitude causing each dislo- Transition Process in Armco Iron
cation to oscillate about its stable static equilibrium 907J0115D Leningrad PISMA V ZHURNAL
position. Figures 4; references 7.
TEKHNICHESKOY FIZIKI in Russian Vol 16 No 10,
26 May 90 pp 75-78
Development of Optical Breakdown in
Shock-Compressed Air
[Article by B.I. Gromov, M.V. Yerofeyev, A.A. Kalin,
907J0112 Moscow TRUDYINSTITUTA and V.A. Moiseyev]
EKSPERIMENTALNOY METEOROLOGII: OPTIKA
ATMOSFERY, SERIYA 'FIZIKA NIZHNEY [Abstract] An experimental metallographic study of 8
ATMOSFERY'in Russian Vol 49(139), 1989 pp 64-69 and e —> a phase transitions induced by laser shock-wave
pulses in Armco iron was made, a being the b.c.c. phase
[Article by A.P. Budnik, S.G. Popov] and e being the c.p.h. phase. The target consisting of
grains within the 150-300 urn size fraction was treated
[Abstract] Development of optical breakdown in air with laser pulses of 3 ns and 23 ns duration at the 50
compressed and heated by a shock wave is analyzed, percent level, with the power density varied up to 5 x
considering a typical situation in which incident radia- 1012 W/cm2 corresponding to 115-140 GPa pressure on
tion of gigawatt/cm2 intensity from a C02 laser causes the target surface under the front of a shock wave. The
supercritical explosion of water aerosol droplets up to 20 evolution of the shock-wave amplitude profile over the
urn in diameter. Within the shock wave, which is gener- target thickness was traced in terms of a hydrodynamic
ated around an exploding droplet, the temperature can model which had been pretested on compression-wave
reach 4000-5000 K and the pressure can reach 100 atm, amplitude and duration. The duration of a shock-wave
the maximum compression being maximum when the pulse was estimated from the dimensions of twins in the
process is adiabatic and reached within 10 ns. As both target and from the thickness of a lamella split off during
temperature and pressure subsequently drop, the one fracture. In specimens treated with laser pulses of 3
residual heat facilitates buildup of an electron avalanche ns duration a correlation was established between the
over a period of about 50 ns. Inasmuch as initiation of dimensions of twins and their distance from the surface
optical breakdown of water aerosol in air requires C02 under such a heat load. Phase transition was identified,
laser pulses of about 100 ns duration. A numerical after etching, by a change of color to a darker one and by
simulation of water droplet and laser pulse interaction an abrupt change in microhardness by a factor of about
indicates that plasmochemical reactions in air can pro- 3 at the interphase boundary, such a large change being
duce an appreciably initial ionization of air, up to an characteristic of phase transition in Armco iron. An
order of 1010cnr3 electron concentration. The principal analysis of the data revealed no phase transition in
reactions within the 3000-5000 K temperature range are Armco iron upon incidence of 3 ns laser pulses and a e —,
the seven reversible ones 02 + M = 0 + 0 + M, N2 + M a phase transition in Armco iron upon incidence of 23 ns
= N + N + M, NO + M = N + 0 + M, N + 02 = NO + 0, laser pulses. The transition time in either direction, on
N2 + O = NO + N, N2 + 02 = 2NO, and NO+ + e = N + the basis of numerical calculations, does depend on the
O (M-denoting a participating neutral atom or mole- amplitude of laser shock waves but is much shorter than
cule). The change of concentration of the seven air had been previously estimated. Figures 2; references 12.
JPRS-UPM-91-001
09 JANUARY 1991 Acoustics
Characteristics of Nonaxisymmetrc Ejections Diamagnetism of Nonequilibrium Semiconductor
From Superhigh-Speed Impact Craters Plasma
907J0118A Leningrad PISMA V ZHURNAL 907J0118C Leningrad PISMA V ZHURNAL
TEKHNICHESKOY F1ZIKI in Russian Vol 16 No 12, TEKHNICHESKOY FIZIKI in Russian Vol 16 No 12,
26 Jun 90 pp 64-68 26 Jun 90 pp 22-26
[Article by E. M. Drobyshevskiy, B. G. Zhukov, S. I.
Rozov, V. M. Sokolov, R. O. Kurakin, M. A. Savelyev, [Article by V. N. Podshivalov, V. V. Masalov, V. I.
Engineering Physics Institute imeni A. F. Ioffe at the Makhov]
USSR Academy of Sciences, Leningrad]
[Abstract] The dynamics of three-dimensional ejections [Abstract] Equilibrium solid state plasma does not pos-
from explosion and high-speed impact craters are not sess any magnetic properties. Magnetism of nonequilib-
well-known, although such phenomena occur often and rium solid state plasma has not yet been described. The
their practical importance is beyond doubt (excavating results of an experimental observation of solid state
explosions, oblique collisions, impact of large meteor- plasma diamagnetism caused by the effect of infrared
ites, etc). Certain characteristics of the superhigh-speed radiation on indium antimonide are presented. An n-
interaction of cubic strikers with the plane bounding a type InSb plate was placed in a copper wire coil and
half-space (actually, with the end of a long D-16 dur- illuminated by a light-emitting diode with a peak at a
alumin cylinder with a 13 cm diameter) are examined. A wavelength of about 0.9 um. Measurements were taken
polycarbonate cube with a 10-12 mm side and a 1-2 g at 77K. The alternating voltage amplitude on the coil
mass was accelerated in an electrodynamic accelerator to terminals was measured during the semiconductor plate
a 4-5.5 km/s velocity, so that its kinetic energy greatly exposure to frequency-modulated infrared radiation
exceeded the molecular binding energy. During the within 40-60 kHz. In addition, the effect of the magnetic
impact it vaporized together with a part of the target induction vector direction on the output signal phase
matter. A corona formed at the moment of impact. The was measured at the resonance frequency. As a result of
nonaxisymmetric ejections from the target during var- the experiments, diamagnetism in nonequilibrium solid
ious types of impact were recorded on film with a 4 us state plasma under the effect of luminous radiation was
frame spacing and a 1 us exposure and the patterns of the demonstrated for the first time. This phenomenon can
ejection shape as a function of the impact angle were be employed for converting electromagnetic radiation
analyzed. References 4: 2 Russian, 2 Western; figures 2. into an electric signal. References 1; figures 2.
JPRS-UPM-91-001
Crystals, Laser Glasses, Semiconductors 09 JANUARY 1991
UDC 538.22 [Abstract] An experimental study of the structural phase
transition in lamellar TiS crystals was made which
2
involved magnetic and thermoelectric measurements.
Reflection of Infrared Radiation by Bi-Sr-Ca-Cu-O
Specimens of these crystals were produced by mixing
Single Crystals and Their Magnetic Susceptibility
more than the stoichiometric amount of TG-100 tita-
907J0076B Kharkov F1ZIKA NIZKIKH nium sponge with extra-pure 16-5 sulfur inside a quartz
TEMPERATUR in Russian Vol 16 No 3, Mar 90 ampule and heating the mixture in a furnace to 830-
pp 299-304 850°C, with precision temperature control for preven-
tion of overheating. Synthesis of titanium sulfide was
completed in 96 h, its specific heat being 80 J/mol.K and
[Article by V.L. Arbuzov, O.M. Bakunin, A.E. Davlet-
the heat of reaction being 400 kJ/mole. The ampule with
shin, S.M. Klotsman, V.L. Konstantinov, M.B.
its content was then cooled in the furnace to room
Kosmina, A.B. Levin, V.P. Semonozhenko, and I.M.
temperature at a rate of 90-100°C/h at the site of crystal
Ysitsilkovskiy, Institute of Single Crystals, Kharkov, and
growth. This process yielded crystals of Ti, iS , 0.25
Institute of Metal Physics, Stocktaking and Distribution 00 2
mm thick and 10 x 20 mm2 large with a = 0.3406-0.3412
Department, USSR Academy of Sciences, Sverdlovsk]
nm and c = 0.5693-0.5699 nm lattice periods. Their
[Abstract] An experimental study was made involving magnetic susceptibility at temperatures covering the
single crystals of Bi Sr . Ca Cu 0 high-T supercon- 4.2-77 K range was measured by Faraday's relative
2 3x x 2 8+y c
ductor materials, the object being to correlate their method on a precision microbalance and automatic
optical properties such as the reflection coefficient for compensation. The temperature gradient along layers
infrared radiation with their electrical resistivity and and the thermo-e.m.f., for calculation of the Seebeck
magnetic susceptibility in both normal and supercon- coefficient a and its temperature dependence over the
ducting states. Specimens of these single crystals were 6-100 K range, were determined on the basis of temper-
produced, from solution of melt with CuO as solvent, by ature measurements with a Cu/Au:Fe thermocouple,
crystallization with the temperature of the melt dropping readings taken at liquid helium and liquid hydrogen
from 1000°C to 800°C at a rate of 5°C/h. Measurements temperatures were corrected for the absolute thermo-
were made on a fresh specimen as well as on two e.m.f. of the copper electrode so as to ensure better
specimens annealed on Zr0 (Y 0 ) substrates in air at accuracy. The crystal lattice was found to be paramag-
2 2 3
850°C for 60 min, and at 880°C for 3 h, respectively, and netic over the entire 4.2-77 K temperature, possibly
then cooled to room temperature not faster than 5°C/ reflecting both Pauli and van Vleck paramagnetisms.
min, both specimens having been heated to their respec- The excess Ti was found to be responsible for direction-
tive annealing temperature at a rate of 7°C/min. Their ality of the magnetic susceptibility, while it obeys Curie's
infrared reflection spectra covering the 100-700 cm"1 law, and to determine the electron concentration in these
range were measured at 300 K and 4.2 K temperatures in crystals. Supplementary electrical resistance measure-
nonpolarized light in an AFS-01 Fourier spectrometer ments have yielded an almost linear decrease of elec-
with a 1.9 cm-1 resolution. The magnetic susceptibility trical resistivity with decreasing temperature down to
was measured in an alternating magnetic field of 0.1 Oe approximately 50 K and then a slower decrease to a
intensity 77.7 kHz frequency, with both quadrature residual level down to 4.2 K. This and the temperature
components of the voltage induced in the measuring coil dependence of the magnetic susceptibility and of the
by the magnetizing current having been compensated at Seebeck coefficient, characterized by change of slope at
100 K temperature. The electrical resistance was mea- or somewhat below the 50 K temperature, are indicators
sured by the current-voltage method with a direct cur- of a structural phase transition occurring within that
rent, silver contact tabs having been deposited on the narrow temperature range and distorting the crystal
surface of each specimen. The results reveal an optical lattice. Figures 3; references 14.
anisotropy and also an anisotropy of the supercon-
ducting energy gap. Anisotropy of the latter is evident
Inversion of Magnetic Field and Vortex Chain in
despite the indeterminacy of critical temperature T and
c Anisotropie Superconductors
thus 2A/kT readings. Figures 4; references 10.
c
907J0086F Moscow ZHURNAL
EKSPERIMENTALNOYI TEORETICHESKOY
UDC 537.638
FIZIKI in Russian Vol 97 No 6, Jun 90 pp 1930-1946
Phase Transition in Lamellar TiS Crystals
2 [Article by A.M. Grishin, A.Yu. Martynovich, and S.V.
907J0083A Leningrad FIZIKA TVERDOGO TELA Yampolskiy, Donetsk Institute of Engineering Physics,
in Russian Vol 32 No 4, Apr 90 pp 980-983 UkSSR Academy of Sciences]
[Abstract] The distribution of Abrikosov vortices and
[Article by G.V. Lashkarev, A.V. Brodovoy, M.V. Rad- their magnetic field structure in uniaxially anisotropic
chenko, I.P. Mintyanskiy, A.L. Mirets, and M.V. type-II superconductors are analyzed, their magnetic
Tovarnitskiy, Institute of Problems in Materials Science, field having here, not only a longitudinal component
UkSSR Academy of Sciences, Kiev] which can oppose the resultant magnetic flux in a vortex,