We propose and carry out a method of resolving the internal structure of inhomogeneously broadened bands in spontaneous combination (Raman) scattering by means of polarization active spectroscopy of combination light scattering.
Show AbstractThermal and dynamic problems of the inshore part of the sea are discussed. Data on the vertical temperature and current-velocity profiles are given.
Show AbstractThe interaction of an electron beam with the field of a microwave cavity is investigated. An expression for the noise temperature of the apparatus is derived. The minimum attainable noise temperature for a single transit system is evaluated.
Show AbstractThe problem of the existence.of solutions of the Green's function equations is discussed.
Show AbstractA theoretical investigation is made of the problem of quasilinear relaxation of a bounded plane - parallel beam. A derivation is given of a quasilinear transport equation for a bounded beam allowing for specular reflection of electrons by the confining walls; this equation is solved explicitly for a monoenergetic beam. It is shown that at the hydrodynamic stage the quasilinear relaxation of abounded beam is of the same nature as the relaxation of an unbounded beam. A characteristic feature of the relaxation is an inhomogeneity of the electron temperature distribution across the direction of motion.
Show AbstractGeneral formulas are derived for the semimedium - couplingrange, accurate to the third approximation of perturbation theory for the frequencies and the second approximation for the intensities. A general formula is derived for the fourth-approximation frequencies in the case in which this approximation makes the main contribution to the splitting. It is shown that the spectra of systems of non-equivalent nuclei preserves in the third approximation the structure characteristic for the first - order spectra. General relations are obtained for determination of the sequence of the lines formed as a result of lifting of degeneracy.
Show AbstractThe results of field studies of the total heat flux and effective radiation flux of the sea surface that were made during a 1976 Black Sea expedition are reported. Newly developed instruments were used to obtain curves of the diurnal cycles of these fluxes, and comparative data are presented for open-sea and inshore areas. The influence of an oil film on the heat fluxes from the sea into the atmosphere is illustrated.
Show AbstractThe paper demonstrates the possibility of computing the synthesis of matching media for continuous parameter distribution. The algorithm developed can beused to specify the thickness of the matching layer and the refractive-index curve in the layer.
Show AbstractWe derive an expression for the power of induced radiation from an anharmonic oscillator in a strong electromagnetic field. It is shown that the maximum radiation power of such an oscillator is obtained in the case that the induced radiation lifetime is much less than the mean time between molecular collisions.
Show AbstractThe radiation of a relativistic charge moving in an inhomogeneous guiding magnetic field of sufficiently smooth form is considered. The polarization-angle characteristic of the radiation are determined as they depend on the vertical deviation of velocity from the equilibrium value. It is shown that there is no explicit dependence of radiation intensity on the radial velocity component in the approximation considered.
Show AbstractThe emission of a massive neutral vector particle by a charged lepton in a magnetic field H and the decay of a resting muon in which an electron is produced in the ground state are considered. The probabilities of these processes are calculated. It is shown that these processes may become most probable in the range of ultrastrong fields $H ≥H_{0}=(m^{2}c^{3})/(e_{0}ħ)= 4,41∙10^{13}$ G.
Show AbstractLinear oscillations of a relativistic plasma are investigated with consideration of radiative deceleration in the hydrodynamic approximat ion. A relativistically invariant dispersion relation is obtained and analyzed for a stationary plasma in the absence of external fields, for a plasma moving at a constant average velocity, and for waves propagating parallel and perpendicular to an external magnetic field. It is shown that the energy losses in collective emission of electrons results in damping of all types of plasma oscillations. This damping exceeds the Landau damping for waves in a plasma with density $n≥10^9$ cm^3, whose phase velocities are at least an order of magnitude higher than the electron thermal velocity.
Show AbstractThe influence of a time-dependent perturbation on the probability of tunneling of a particle through a barrier is considered on the basis of solution of the nonstationary Schroedinger equation.
Show AbstractThe method of impedance characteristics is used to discuss the distribution of an electric field in multilayer resonance-type systems capable of amplifying the amplitude of the incident field inside the system by Interference effects. Analytic relationships for the intensity of an electric field in layers of different structures are derived using real parameters of dielectrics.
Show AbstractIn this paper we examine the possibility of the occurrence of superconductivity in a disordered system. In view of the results obtained here, we discuss the possibility of superconductivity in amorphous semiconductors in which the free charge carriers are created in sufficient number by the action of light.
Show AbstractPoincare's small-parameter method for Hamiltonian systems is used to investigate the existence of periodic solutions in the problem of rotational motion of an axisymmetric satellite about its center of mass on a circular orbit. The motion of the satellite is described by Andoyer's canonical osculating elements. Analytic conditions are obtained for the existence of Schwarzschild and Poincare periodic solutions and they are investigated qualitatively and numerically.
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