{"id":5690,"date":"2013-03-22T15:59:11","date_gmt":"2013-03-22T11:59:11","guid":{"rendered":"http:\/\/ellphi.lebedev.ru\/?p=5690"},"modified":"2013-04-05T15:00:11","modified_gmt":"2013-04-05T11:00:11","slug":"1976-en","status":"publish","type":"post","link":"http:\/\/preprints.lebedev.ru\/?p=5690","title":{"rendered":"1976 En"},"content":{"rendered":"

N.V. Pichkurov<\/em> , A.I. Nikishov<\/em> ,
\n \u2116 3 <\/strong> ENERGY SPECTRUM OF e+e PAIR CREATED IN THE COLLISION OF TWO FAST CHARGED PARTICES
\n\u0421\u043a\u0430\u0447\u0430\u0442\u044c \u043f\u0440\u0435\u043f\u0440\u0438\u043d\u0442<\/a> |\u0410\u043d\u043d\u043e\u0442\u0430\u0446\u0438\u044f|<\/a>\n

The energy spectrum of e+e \u0432 pair produced In the collision of a epln-1\/2 particle with a Coulomb centre is obtained taking into account two Feynman diagrams essential for the low energy range of spectrum ---------------------------<\/div>\n<\/p>\n

S.I. Syrovatskii<\/em> ,
\n \u2116 7 <\/strong> ON THE POSSIBILITIES TO OBSERVE PREFLARE CARREN\u0422 SHEETS ON THE SUN
\n\u0421\u043a\u0430\u0447\u0430\u0442\u044c \u043f\u0440\u0435\u043f\u0440\u0438\u043d\u0442<\/a> |\u0410\u043d\u043d\u043e\u0442\u0430\u0446\u0438\u044f|<\/a>\n

We discuss the possible ways of early search for current sheets on the sun with the purpose to forecast the probability of occurenoe, the total energy and the power of solar flares. She data on current sheets can be obtained by observations of magnetic field, ultraviolet lines and microwave emission ---------------------------<\/div>\n<\/p>\n

A.A. Komar<\/em> , G.I. Orlova<\/em> , M.I. Tretyakova<\/em> , M.M. Chernyavsky<\/em> ,
\n \u2116 13 <\/strong> OBSERVATION OF THE SINGLE ELECTRON IN PN-INTERACTION IN NUCLEAR EMULSION AND POSSIBLE INTERPRETATION OF THE EVENT AS THE MANIFESTATION OF THE CHARMED PARTICLES PRODUCTION
\n\u0421\u043a\u0430\u0447\u0430\u0442\u044c \u043f\u0440\u0435\u043f\u0440\u0438\u043d\u0442<\/a> |\u0410\u043d\u043d\u043e\u0442\u0430\u0446\u0438\u044f|<\/a>\n

Detailed analysis of the emulsion star with single electron among secondaries, reported earlier [1]is given. The probability of the single electron appearance in the vicinity of the star centre due to the ordinary processes is shown to be ~ 10-5. Enlarged information supports previous assumption that this event may be manifestation of the charmed particles protection ---------------------------<\/div>\n<\/p>\n

O.K. Kalashnikov<\/em> ,
\n \u2116 17a <\/strong> ASYMPTOTICALLY FREE SU(2)X SU(2)XSU(4) MODEL OP UNIFIED INTERACTION
\n\u0421\u043a\u0430\u0447\u0430\u0442\u044c \u043f\u0440\u0435\u043f\u0440\u0438\u043d\u0442<\/a> <\/p>\n

I.I. Royzen<\/em> ,
\n \u2116 39 <\/strong> THE IMPLICATION OP UNITAR ITY CONDITION IN THE FRAMEWORK OF MULTIPERIPHERAL THEORY
\n\u0421\u043a\u0430\u0447\u0430\u0442\u044c \u043f\u0440\u0435\u043f\u0440\u0438\u043d\u0442<\/a> |\u0410\u043d\u043d\u043e\u0442\u0430\u0446\u0438\u044f|<\/a>\n

A completely unitary model of hadron interaction at high energies is suggested. It is shown that within the multi-peripheral approach the account taken of unitarity leads to corrections which in tares of Regge theory may be treated as a here vacuum singularity intercept at the point ---------------------------<\/div>\n<\/p>\n

D.S. Chernavskii<\/em> , I.M. Dremin<\/em> , T.I. Kanarek<\/em> , E.I. Volkov<\/em> ,
\n \u2116 40 <\/strong> CLUSTERS IN PERIPHERAL PROCESSES
\n\u0421\u043a\u0430\u0447\u0430\u0442\u044c \u043f\u0440\u0435\u043f\u0440\u0438\u043d\u0442<\/a> |\u0410\u043d\u043d\u043e\u0442\u0430\u0446\u0438\u044f|<\/a>\n

The main si\u0448 of this paper is to propose the criterion which gives the possibility to distinguish between the models with different mechanisms of cluster production. As an example we consider two multiperipheral models both of which fit the traditional distributions rather well even though they strongly differ In physical assumptions about the origin of clusters. The newly proposed rapidity interval method helps to discriminate between them and to show that clusters are produced peripherally with rather large masses ---------------------------<\/div>\n<\/p>\n

\u041d.\u0413. \u0411\u0430\u0441\u043e\u0432<\/em> , \u0410.\u0413. \u041c\u043e\u043b\u0447\u0430\u043d\u043e\u0432<\/em> , \u0410.\u0421. \u041d\u0430\u0441\u0438\u0431\u043e\u0432<\/em> , \u0410.\u0412. \u041e\u0431\u0438\u0434\u0438\u043d<\/em> , \u0410.\u041d. \u041f\u0435\u0447\u0435\u043d\u043e\u0432<\/em> , \u042e.\u041c. \u041f\u043e\u043f\u043e\u0432<\/em> ,
\n \u2116 41 <\/strong> \u0421\u0422\u0420\u0418\u041c\u0415\u0420\u041d\u042b\u0415 \u041b\u0410\u0417\u0415\u0420\u042b \u041d\u0410 \u0422\u0412\u0401\u0420\u0414\u041e\u041c \u0422\u0415\u041b\u0415
\n\u0421\u043a\u0430\u0447\u0430\u0442\u044c \u043f\u0440\u0435\u043f\u0440\u0438\u043d\u0442<\/a> |\u0410\u043d\u043d\u043e\u0442\u0430\u0446\u0438\u044f|<\/a>\n

A new method of electrically exciting generation of light behind the ionization fronts in streamers is considered\/ Light intensity ~ 109 W\/cm\u00b2 was generated in CdxSe1-x end ZnSe crystals from radiation regions having characteristic dimensions ~ 5 and moving with \u042f Velocities ~ 3-108 cm\/sec ---------------------------<\/div>\n<\/p>\n

V.V. Dodonov<\/em> , I.A. Malkin<\/em> , V.I. Man»ko<\/em> ,
\n \u2116 42 <\/strong> QUANTUM STATISTICS OF QUADRATIC SYSTSIS
\n\u0421\u043a\u0430\u0447\u0430\u0442\u044c \u043f\u0440\u0435\u043f\u0440\u0438\u043d\u0442<\/a> |\u0410\u043d\u043d\u043e\u0442\u0430\u0446\u0438\u044f|<\/a>\n

Equilibriium and nonequilibrium density matrices and Winner’s functions for quantum systems with arbitrary quadratic Hamiltonians are calculated by means of the integrals of the motion method. Explicit formulae for average values and characteristic functions of various operators are obtained. Thermodynamics! potentials of ideal quantum systems obeying Maxwell-Boltsmann’s Fermi-Dirac’s, Bose-Einstein’s statistics and parastatics are expressed in terms of one-particle partition functions. Several examples! multidimensional oscillator, the motion of a charged particle with arbitrary quadratic dispersion law in uniform electromagnetic fields, coherent states representation, etc.,- are considered ---------------------------<\/div>\n<\/p>\n

Yu.L. Kokurin<\/em> , V.V. Kurbasov<\/em> , V.S. Lobanov<\/em> , A.N. Sukhanovsky<\/em> ,
\n \u2116 59 <\/strong> LUNAR LASER RANGING SYSTEM F\u041eR MEASURING THE DISTAHCES WITH ACCURACT 20 CM
\n\u0421\u043a\u0430\u0447\u0430\u0442\u044c \u043f\u0440\u0435\u043f\u0440\u0438\u043d\u0442<\/a> |\u0410\u043d\u043d\u043e\u0442\u0430\u0446\u0438\u044f|<\/a>\n

The system is described, which includes a four-stage transmitter with pulse width of 8 neec and pulse repetition rate 0.33 ops, and the photo-detecting and registrating instrumentation with time resolution of the on-line mini-computer. The laser is mounted stationery in the Coude configuration of the telescope. The detector package is located in the centre of the telescope polar platform, which prorides a wide field of viev necessary for directing the laser to the reflectors at the dark side of the Moon. The reflected signal Is received during the «time-gate» formed for each laser pulse by the computer, into which the 30-min ephemerieal points are preliminary introduced. The data processing is performed by the on-line computer, and the range residuals are presented on the display with accuracy of 1 nsec. The epoch of the actual laser firing is marked relatively to the atomic time seal with accuracy 100 se\u0441 ---------------------------<\/div>\n<\/p>\n

V.P. Frolov<\/em> , I.P. Volovich<\/em> , V.A. Zagrebnov<\/em> ,
\n \u2116 60 <\/strong> QUANTUM PARTICLE CREATON (HAWKING EFFECT)\u0412Y N\u041eN -STATIONARY \u0412LACK HOLES
\n\u0421\u043a\u0430\u0447\u0430\u0442\u044c \u043f\u0440\u0435\u043f\u0440\u0438\u043d\u0442<\/a> |\u0410\u043d\u043d\u043e\u0442\u0430\u0446\u0438\u044f|<\/a>\n

We consider a particle creation in the gravitational field of the black hole with variable mass. It is shown that for the adiabatic variation of black hole parameters (the rate for variation of the gravitational radius 2GM\/c\u00b2 much less than the light velocity ) the nonstationarity is reduced effectively to the retarded time dependence of the Hawking-type emission ---------------------------<\/div>\n<\/p>\n

I.L. Beigman<\/em> , F.I. Klimuk<\/em> , V.I. Sevas<\/em> , A.I. Shurygin<\/em> , I.P. Tindo<\/em> , I.A. Vapnshtein<\/em> ,
\n \u2116 61 <\/strong> INVESTIGATION OF SOFT X-RAYEMISSION FROM HER \u0425-1 AJND SCO \u0425-1 FROM ORBITAL STATION «SALYUT-4»
\n\u0421\u043a\u0430\u0447\u0430\u0442\u044c \u043f\u0440\u0435\u043f\u0440\u0438\u043d\u0442<\/a> <\/p>\n

N.G. Basov<\/em> , A.S. Bashkin<\/em> , P.G. Grigoriev<\/em> , A.N. Oraevsky<\/em> , O.E. Porodinkov<\/em> ,
\n \u2116 62 <\/strong> QUAHTUM CHEMICAL DP-CO2 AMPLIFIER WITH HIGH-POWER PHOTOINITIATIOH
\n\u0421\u043a\u0430\u0447\u0430\u0442\u044c \u043f\u0440\u0435\u043f\u0440\u0438\u043d\u0442<\/a> <\/p>\n

A.I. Nikishov<\/em> ,
\n \u2116 69 <\/strong> ENERGY SPECTRUM OF A LEPTON PAIR (CONTRIBUTION FROM VIRTUAL BREMESTRAHLUNG)
\n\u0421\u043a\u0430\u0447\u0430\u0442\u044c \u043f\u0440\u0435\u043f\u0440\u0438\u043d\u0442<\/a> |\u0410\u043d\u043d\u043e\u0442\u0430\u0446\u0438\u044f|<\/a>\n

The energy spectrum of a lepton pair produced by an incident lepton via virtual bremsetrahlung is obtained. She masses m and \u0418 of pair leptons and of incident lepton are kept arbitrary. For a nonscreened Coulomb centre as a target the result is relatively simple. In a case of screened Coulomb centre we use the analitical approximation [1] for the screening functions \u04441, \u04441 of Bethe. She corrections due to elastic nuclear form factor are also included. For real photon emission by an incident muon these corrections are in a rather good agreement with the parametrization proposed in[2]and defined more exactly in [1] ---------------------------<\/div>\n<\/p>\n

L.M. Ozernoy<\/em> , V.V. Usov<\/em> ,
\n \u2116 73 <\/strong> REGULAR OPTICAL VARIABILITY OF QUASARS AND NUCLEI OF GALAXIES AS A CLUE TO THE NATURE OF THEIR ACTIVITY
\n\u0421\u043a\u0430\u0447\u0430\u0442\u044c \u043f\u0440\u0435\u043f\u0440\u0438\u043d\u0442<\/a> |\u0410\u043d\u043d\u043e\u0442\u0430\u0446\u0438\u044f|<\/a>\n

We summarize available observational data on that some quasars and active galaxies possess remarkable regular components in their brightness variations: the light curve contains two kinds of regularities — (1) periodic variations with email phase drift and period of about several tens or hundreds of days, and (2) quasi-periodic variations with appreciable phase drift and «period» Pg of about several years. These regularities are in a strong contradiction with the usual concept of the source of activity as a compact star cluster where stars undergo mutual independent collisions or\/and flare up like supernova. It is also impossible to explain these regularities within the usual picture of disc accretion on to supermassive black hole. In principle, the difficulties may be avoided in the multiple-pulsar model when the star cluster possesses collective properties (including the common rotation and magnetic field), or in the model of accreting black hole surrounded by an optically thick magnetized plasma corona. In fact, it is difficult to distinguish such rather complicated models from a magnetold — an unique rotating magnetized body. The regular character of the observed light variations may be explained within the framework of supermassive oblique rotator, i.e. of the simplest case of such a body. In this case the period P1 is explained naturally by rotation, and the quasi-period P2 -by pulsating outflow of matter from the rotator ---------------------------<\/div>\n<\/p>\n

I.V. Andreev<\/em> ,
\n \u2116 92 <\/strong> THE METHOD F\u041eR CALCULATION OF NUCLEUS-NUCLEUS CROSS-SECTIONS
\n\u0421\u043a\u0430\u0447\u0430\u0442\u044c \u043f\u0440\u0435\u043f\u0440\u0438\u043d\u0442<\/a> <\/p>\n

V.I. Ritus<\/em> ,
\n \u2116 93 <\/strong> THE DIFFERENT RENORMINVARIANT CHARGES OF QUANTUM ELECTRODYNAMICS
\n\u0421\u043a\u0430\u0447\u0430\u0442\u044c \u043f\u0440\u0435\u043f\u0440\u0438\u043d\u0442<\/a> |\u0410\u043d\u043d\u043e\u0442\u0430\u0446\u0438\u044f|<\/a>\n

Together with the usual renorminveriant charge defined by photon propagator the invariant charge defined by Lagrange function of intensive constant electromagnetic field and the bare invariant charge defined by Z3-factor are considered. The Gell-Mann-Low functions 2(z) and 3(z) of the last two charges were found in -approximation and turned out to be different from one another and free Gell-Mann-Low function 1z) of the first charge ---------------------------<\/div>\n<\/p>\n

L.M. Ozernoy<\/em> , V.R. Chertoprud<\/em> , L.I. Gudzenko<\/em> ,
\n \u2116 95 <\/strong> COMMENTS ON THE LIGHT CURVE OF THE QUASAR 3C 273
\n\u0421\u043a\u0430\u0447\u0430\u0442\u044c \u043f\u0440\u0435\u043f\u0440\u0438\u043d\u0442<\/a> |\u0410\u043d\u043d\u043e\u0442\u0430\u0446\u0438\u044f|<\/a>\n

The interpretation of the light curve of the quasar 3C 273 as a superposition of independent random pulses (Fahlman and Ulrich, 1975) is in a contradiction with essential properties Of the observed variability of this object. Of the two variability conceptions — superposition of independent pulses and essentially non-linear system (coherent, or unique body) -the first one appears to be extremely unlikely ---------------------------<\/div>\n<\/p>\n

E.V. Ivanova<\/em> , I.A. Malkin<\/em> , V.I. Man’ko<\/em> ,
\n \u2116 109 <\/strong> Radition of a charged particle in fields of waveguide type.
\n\u0421\u043a\u0430\u0447\u0430\u0442\u044c \u043f\u0440\u0435\u043f\u0440\u0438\u043d\u0442<\/a> <\/p>\n

L.N. Bulaevsky<\/em> , D.I. Khomskii<\/em> ,
\n \u2116 110 <\/strong> Three-dimensional ordering of charge-density waves in layered compounds.
\n\u0421\u043a\u0430\u0447\u0430\u0442\u044c \u043f\u0440\u0435\u043f\u0440\u0438\u043d\u0442<\/a> <\/p>\n

B.V. Somov<\/em> , S.I. Syrovatskii<\/em> ,
\n \u2116 115 <\/strong> On the thermal instability of hot plasma produced by solar flares.
\n\u0421\u043a\u0430\u0447\u0430\u0442\u044c \u043f\u0440\u0435\u043f\u0440\u0438\u043d\u0442<\/a> <\/p>\n

V.A. Chechin<\/em> , V.K. Ermilova<\/em> ,
\n \u2116 116 <\/strong> The transition radition energy distribution.
\n\u0421\u043a\u0430\u0447\u0430\u0442\u044c \u043f\u0440\u0435\u043f\u0440\u0438\u043d\u0442<\/a> |\u0410\u043d\u043d\u043e\u0442\u0430\u0446\u0438\u044f|<\/a>\n

A general formula for transition radiation energy distribution is obtained. Approximations corresponding to small and large average number of emitted photons are analysed. The comparison of the theory considered and the experimental data is discussed. ---------------------------<\/div>\n<\/p>\n

I.M. Dremin<\/em> , E.I. Volkov<\/em> , M.I. Adamovich<\/em> , V.G. Larionova<\/em> , G.I. Orlova<\/em> , M.I. Tretjakova<\/em> , S.P. Kharlamov<\/em> , M.M. Chernjavsky<\/em> , F.R. Yagudina<\/em> ,
\n \u2116 122 <\/strong> Distributions of rapidity intervals in inelastic hadron-hadron interactions at high energies.
\n\u0421\u043a\u0430\u0447\u0430\u0442\u044c \u043f\u0440\u0435\u043f\u0440\u0438\u043d\u0442<\/a> <\/p>\n

Gatchina.Moskow. Alma-Ata<\/em> ,
\n \u2116 123 <\/strong> Distributions of rapidity intervals in pion-nucleon interactions at 200gev.c and multiperiphral claster model.
\n\u0421\u043a\u0430\u0447\u0430\u0442\u044c \u043f\u0440\u0435\u043f\u0440\u0438\u043d\u0442<\/a> |\u0410\u043d\u043d\u043e\u0442\u0430\u0446\u0438\u044f|<\/a>\n

Tashkent-collaboration. ---------------------------<\/div>\n<\/p>\n

M.I. Adamovich<\/em> , M.M. Chernjavsky<\/em> , S.P. Kharlamov<\/em> , V.G. Larionova<\/em> , G.I. Orlova<\/em> , M.I. Tretjakova<\/em> , E.I. Volkov<\/em> , V.R. Yagudina<\/em> ,
\n \u2116 124 <\/strong> The dependence of differential cross sections of inelastic P- and PP-interactions at 60, 67 and 200gev on maximum intervals of rapidity.
\n\u0421\u043a\u0430\u0447\u0430\u0442\u044c \u043f\u0440\u0435\u043f\u0440\u0438\u043d\u0442<\/a> <\/p>\n

I.L. Fabelinskii<\/em> , G.I. Kolesnikov<\/em> , V.S. Starunov<\/em> ,
\n \u2116 137 <\/strong> Temperature dependence of rayleigh line wing and depolarized combinational scattering line widths in oritical mixtures.
\n\u0421\u043a\u0430\u0447\u0430\u0442\u044c \u043f\u0440\u0435\u043f\u0440\u0438\u043d\u0442<\/a> <\/p>\n

I.L. Fabelinskii<\/em> , G.I. Kolesnikov<\/em> , V.Ja. Shreiner<\/em> , V.S. Starunov<\/em> ,
\n \u2116 138 <\/strong> Temperature dynamics of polarized and depolarized light scattering in a chitical mixture.
\n\u0421\u043a\u0430\u0447\u0430\u0442\u044c \u043f\u0440\u0435\u043f\u0440\u0438\u043d\u0442<\/a> <\/p>\n

I.L. Fabelinskii<\/em> , V.S. Starunov<\/em> , A.K. Atakhodkaev<\/em> , l.m. Sabirov<\/em> , T.M. Utarova<\/em> ,
\n \u2116 139 <\/strong> Rayleigh line wing and cofficient of depolarization of scattered light in critical mixture.
\n\u0421\u043a\u0430\u0447\u0430\u0442\u044c \u043f\u0440\u0435\u043f\u0440\u0438\u043d\u0442<\/a> <\/p>\n

S.I. Nikolsky<\/em> ,
\n \u2116 140 <\/strong> New processes in ultra-high energy nucleon interactions.
\n\u0421\u043a\u0430\u0447\u0430\u0442\u044c \u043f\u0440\u0435\u043f\u0440\u0438\u043d\u0442<\/a> <\/p>\n

M.V. Fedorov<\/em> ,
\n \u2116 144 <\/strong> Direct and resonant ionization of atoms and switching-on of the interaction.
\n\u0421\u043a\u0430\u0447\u0430\u0442\u044c \u043f\u0440\u0435\u043f\u0440\u0438\u043d\u0442<\/a> |\u0410\u043d\u043d\u043e\u0442\u0430\u0446\u0438\u044f|<\/a>\n

Direct and resonant ionizaion of atoms are considered by an intense electromagnetic wave with an arbitrary (smocth) envelope f(t). Among others the Jwkb method (over time) is used for a solution of the problem. Some regions of light wave parameters are investigated corresponding to different kindes of a resonance broadening. The resonant curves are found, describing the dependence opf the resonant ionization probability on the resonance detuning \u0415. The resonance width estimation is given, which is valid for every light pulse with any values of its intensity, duration and any form of its envelope. ---------------------------<\/div>\n<\/p>\n

V.Ya. Feinberg<\/em> , M.A. Soloviev<\/em> ,
\n \u2116 152 <\/strong> Causality, localizability and holomorfhically convex hulls.
\n\u0421\u043a\u0430\u0447\u0430\u0442\u044c \u043f\u0440\u0435\u043f\u0440\u0438\u043d\u0442<\/a> <\/p>\n

V.A. Fateev<\/em> , A.S. Schwars<\/em> , Yu.S. Tyupkin<\/em> ,
\n \u2116 155 <\/strong> On particle-like solutions in the presence of fermions.
\n\u0421\u043a\u0430\u0447\u0430\u0442\u044c \u043f\u0440\u0435\u043f\u0440\u0438\u043d\u0442<\/a> <\/p>\n

R.A. Nam<\/em> , S.I. Nikolsky<\/em> , N.I. Starkov<\/em> , A.P. Chubenko<\/em> , V.A. Tsarev<\/em> , V.I. Yakovlev<\/em> ,
\n \u2116 156 <\/strong> The measurement of hadron_nucleus inelastic cross_sections at energies higher than those of accelerators.
\n\u0421\u043a\u0430\u0447\u0430\u0442\u044c \u043f\u0440\u0435\u043f\u0440\u0438\u043d\u0442<\/a> <\/p>\n

V.L. Ginzburg<\/em> , L.M. Ozernoy<\/em> ,
\n \u2116 157 <\/strong> On the nature of quasars and active galactic nuclei.
\n\u0421\u043a\u0430\u0447\u0430\u0442\u044c \u043f\u0440\u0435\u043f\u0440\u0438\u043d\u0442<\/a> <\/p>\n

V.P. Frolov<\/em> , A.I. Zhok<\/em> ,
\n \u2116 175 <\/strong> GRVITAYIONAL FIELD \u041eF CHARGED RADIATING SISTEMS
\n\u0421\u043a\u0430\u0447\u0430\u0442\u044c \u043f\u0440\u0435\u043f\u0440\u0438\u043d\u0442<\/a> <\/p>\n

\u0410.\u0421. \u0410\u043b\u0435\u043a\u0441\u0430\u043d\u0434\u0440\u043e\u0432<\/em> , \u042e.\u041f. \u041b\u0438\u0441\u043e\u0432\u0435\u0446<\/em> , \u0412.\u0424. \u0415\u043b\u0435\u0441\u0438\u043d<\/em> , \u0418.\u0410. \u041f\u043e\u043b\u0443\u044d\u043a\u0442\u043e\u0432<\/em> , \u042e.\u041c. \u041f\u043e\u043f\u043e\u0432<\/em> ,
\n \u2116 176 <\/strong> \u0422\u0415\u041e\u0420\u0418\u042f \u0420\u0410\u0421\u041f\u0420\u041e\u0421\u0422\u0420\u0410\u041d\u0415\u041d\u0418\u042f \u041c\u041e\u0429\u041d\u042b\u0425 \u0421\u0412\u0415\u0422\u041e\u0412\u042b\u0425 \u0418\u041c\u041f\u0423\u041b\u042c\u0421\u041e\u0412 \u0427\u0415\u0420\u0415\u0417 \u041f\u041e\u041b\u0423\u041f\u0420\u041e\u0412\u041e\u0414\u041d\u0418\u041a \u0412 \u0423\u0421\u041b\u041e\u0412\u0418\u042f\u0425 \u041c\u0415\u0416\u0414\u0423\u0417\u041e\u041d\u041d\u041e\u0413\u041e \u0412\u0417\u0410\u0418\u041c\u041e\u0414\u0415\u0419\u0421\u042c\u0412\u0418\u042f
\n\u0421\u043a\u0430\u0447\u0430\u0442\u044c \u043f\u0440\u0435\u043f\u0440\u0438\u043d\u0442<\/a> |\u0410\u043d\u043d\u043e\u0442\u0430\u0446\u0438\u044f|<\/a>\n

A theoretical study is made of propagation of light pulses in semiconductor crystals under the condition of interband interaction: , where is the pulse frequency, and is the forbidden bandwidth. Material equations for polarizability and populations in bands taking Into account relaxation processes (electron-phonen, electron-impurity, and electron-electron interactions) are derived. The influence of strong field on collisional processes in studied. The possibility of increasing the relaxation time at the presence of strong field, as well an the effect of oolllsional processes on the character of radiative interband transitions is shown (the appearance of transitions without conservation of electron quasi momentum). The material equations Obtained (including equations far the field) are generalized for the case of doped semiconducters, and may also be used for the study of various radiation regimes in semioenduoter lasers ---------------------------<\/div>\n<\/p>\n

N.G. Basov<\/em> , A.A. Kologrivov<\/em> , O.N. Krokhin<\/em> , A.A. Rupasov<\/em> , G.V. Sklizkov<\/em> , A.S. Shikanov<\/em> , Yu.A. Zakharenkov<\/em> , N.N. Zorev<\/em> ,
\n \u2116 177 <\/strong> INTERACTION OF POWERFUL LASER RADIATION WITH SHELL TARGETS
\n\u0421\u043a\u0430\u0447\u0430\u0442\u044c \u043f\u0440\u0435\u043f\u0440\u0438\u043d\u0442<\/a> <\/p>\n

A.V. Vinogradov<\/em> , B.Ya. Zel»dovich<\/em> ,
\n \u2116 185 <\/strong> \u0425-R\u0410Y AND FAR UV MULTILAYER MIRROBS — PRINCIPLES POSSIBLITIES
\n\u0421\u043a\u0430\u0447\u0430\u0442\u044c \u043f\u0440\u0435\u043f\u0440\u0438\u043d\u0442<\/a> |\u0410\u043d\u043d\u043e\u0442\u0430\u0446\u0438\u044f|<\/a>\n

We discuss the possibility to create multilayer reflecting coating using materials whose dielectric susceptibility is very close to unity at the frequency considered. For a pair of such substances with given Be and Im the explicit expressions for the reflection coefficient and for the optimum thickness of layers have been obtained. The results are extended to the case of oblique incidence for both polarizations. We present here some calculation results for the reflection coefficient when the periodical structures are composed of the following pairs of the media: Al-Cu, Al-Bi, C-Au, for which we could find experimental data on the optical constants in the far UV region. It is shown that the pair carbon-gold yields the best reflectivity. The reflection coefficient for the periodical structure \u0421-\u0410u, in the wavelength range from —-
\n, is about 40%. That value is thousand times higher than the Fresnel reflectivity for gold ---------------------------<\/div>\n<\/p>\n

I.P. Ivanenko<\/em> , V.V. Makarov<\/em> , L.A. Hein<\/em> ,
\n \u2116 188a <\/strong> CERENKOV RADIATION FROM SHOWERS DEVELOPING IN ATMOSPHERE AND WATER PART II
\n\u0421\u043a\u0430\u0447\u0430\u0442\u044c \u043f\u0440\u0435\u043f\u0440\u0438\u043d\u0442<\/a> |\u0410\u043d\u043d\u043e\u0442\u0430\u0446\u0438\u044f|<\/a>\n

has been used to calculate FSD CR (function of spatial distribution at Cerenkov radiation ) from the electron-photon showers developing in water which is necessary to analyze the experimental data for the DUMAND program \/I\/. The effect of the finite lengh of cascade on FSD CR has been analyzed. The results for FSAD CR (function of spatial angular distribution of Cerenkov radiation) from the showers developing in the atmosphere and FSAD from EAS detected with narrow-angle counters are presented. The results are shown to be necessary to analyze the experimental data from the point sources of the superhigh energ y-quanta ---------------------------<\/div>\n<\/p>\n

E.B. Fradkin<\/em> , M.A. Vasiliev<\/em> ,
\n \u2116 197 <\/strong> MODEL OF SUPERGRAVITY WITH MINIMAL ELECTROUMAGNETIC INTERACTION
\n\u0421\u043a\u0430\u0447\u0430\u0442\u044c \u043f\u0440\u0435\u043f\u0440\u0438\u043d\u0442<\/a> <\/p>\n

A.D. Linde<\/em> ,
\n \u2116 198 <\/strong> EXPANSION, VACUUM STABILITY AND QUARK CONFINEMENT
\n\u0421\u043a\u0430\u0447\u0430\u0442\u044c \u043f\u0440\u0435\u043f\u0440\u0438\u043d\u0442<\/a> |\u0410\u043d\u043d\u043e\u0442\u0430\u0446\u0438\u044f|<\/a>\n

A method is suggested which makes possible the investigation of the ultreviolet (infrared) behaviour of a class of ultraviolet (infrared) unstable theories. By the use of this method we argue in particular that the theory (\/N).4 of the H-component field at ell sufficiently large N and for \u0430n\u0443 sign of is unstable with respect to the spontaneous generation of an infinitely large classical field ---------------------------<\/div>\n <\/p>\n","protected":false},"excerpt":{"rendered":"

N.V. Pichkurov , A.I. Nikishov , \u2116 3 ENERGY SPECTRUM OF e+e PAIR CREATED IN THE COLLISION OF TWO FAST CHARGED PARTICES \u0421\u043a\u0430\u0447\u0430\u0442\u044c \u043f\u0440\u0435\u043f\u0440\u0438\u043d\u0442 |\u0410\u043d\u043d\u043e\u0442\u0430\u0446\u0438\u044f| The energy spectrum of e+e \u0432 pair produced In the collision of a epln-1\/2 particle with a Coulomb centre is obtained taking into account two Feynman diagrams essential for the […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[8],"tags":[],"_links":{"self":[{"href":"http:\/\/preprints.lebedev.ru\/index.php?rest_route=\/wp\/v2\/posts\/5690"}],"collection":[{"href":"http:\/\/preprints.lebedev.ru\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/preprints.lebedev.ru\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/preprints.lebedev.ru\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"http:\/\/preprints.lebedev.ru\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=5690"}],"version-history":[{"count":0,"href":"http:\/\/preprints.lebedev.ru\/index.php?rest_route=\/wp\/v2\/posts\/5690\/revisions"}],"wp:attachment":[{"href":"http:\/\/preprints.lebedev.ru\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=5690"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/preprints.lebedev.ru\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=5690"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/preprints.lebedev.ru\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=5690"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}