The possibilities for description of photonuclear reactions by the coupledchannel method are examined. It is shown that the application of an optical potential with a realistic imaginary part does not lead to the phenomenon of giant resonance in the hole channels of the final nucleus. This may indicate both a large contribution to the imaginary part of the optical potential from the simplest channels and the inapplicability in principle of the coupledchannel method with a complex optical potential for a realistic description of photonuclear reactions.
Show AbstractThe binding energy of hypertritium is calculated and the role of λ-N -interaction spin forces is analyzed.
Show AbstractThe vertical structure of turbulence in a channel with free boundaries is considered using experimental data. In particular, the vertical distribution of turbulent friction, the coefficient of turbulent viscosity, and the horizontal dimensions(scale) of the turbulence are considered. Experimental data obtained by recording the longitudinal and vertical components of the velocity by the thermohydrometer method are presented. The time and spatial Lagrange scales defined from the space-time correlations are given.
Show AbstractThe dependence of the scalar and electromagnetic fields on the vectors of tangential spaces of the space-time manifold with absolute parallelism is obtained using the methods of the theory of Pinsler spaces.
Show AbstractAn estimation of the second derivative of the ion current on a probe, which is needed to determine the specific form of the electron energy distribution function is proposed. Various methods of experimentally excluding the effect of the ion current on the measurement of the electron distribution function are discussed.
Show AbstractThe statistics of rays in a plane-layered isotropic medium with isomeric inhomogeneities are described in the Markov approximation. A solution of the Einstein-Pokker equation is obtained in the small-angle approximation in the form of a series in Hermite polynomials. Estimates are obtained for a model of a linear layer, when one can use a normal distribution law of the angular fluctuations as a solution of the problem. The frequency dependence of the angular fluctuations of the wave at the exit from linear and parabolic layers is analyzed for two models of the high-level behavior of the electron density fluctuations of the medium.
Show AbstractThe properties of orographic disturbances for flow over the extended Ural range taking into account the effect of a stable stratosphere are considered by solving the equation of the nonlinear two-dimensional problem for a two-layer atmosphere. The results are compared with experimental observations for this region. Certain features of the orographic disturbances over mountain ranges are explained.
Show AbstractWe propose a simplified model of the positive column of a strongly anisothermal plasma, based on the assumption of ion drift in strong fields, while the inertia of the ions is formally taken into account by limiting the velocity of ambipolar drift at the boundary of the plasma to the ionic speed of sound. This permits finding simple relations for the ionization frequency and boundary concentration of the plasma as functions of the similarity parameter of the discharge. It is shown that the region of applicability of the simplified model on the side of high gas pressures borders the region of applicability of Schottky theory.
Show AbstractThe results of a theoretical calculation of the spatial correlation functions of bottom reverberation picked up by a pair of dipoles differently oriented in a horizontal plane are presented. The condition for the mutual position of the radiation patterns of the dipoles and the radiating antennas for which the action of reverberation interference is a minimum are obtained.
Show AbstractAccurate expressions are obtained for the radiation fields of a "Cherenkov" charge when there is an instantaneous jump of the dielectric constant with time, neglecting dispersion.
Show AbstractThe method of dielectric resonator was applied in the determination of the dielectric losses of ferroelectrics in the decimeter and three-centimeter wavelength bands. The minimum values of tgδ obtained from the measurement in neither case exceed(3 to 5)•10^(-5). The function tgδ(Т)in the temperature range 78-350°K of mono- and polycrystalline strontium titanate was studied.
Show AbstractIt is shown that in a reacting one-component system contained in a light gas thermostat, a relatively small distortion in the "tail" of the Maxwellian distribution of the particles of the thermostat can lead to a noticeable change in the rate of reaction. The velocity• distribution function of the reacting component is found, and concrete expressions for the rate of chemical reactions in a non-Maxwellian thermostat are obtained. As an example, the reaction HI + HI = $I_{2}$+$H_{2}$ in an atmosphere of He is examined.
Show AbstractThe effect of gravitational waves on electromagnetic systems with lumped parameters as investigated. A method of calculation of the effect of gravitational radiation on compact electromagnetic systems using a Lagrangian formulation is developed. As concrete systems, an electromagnetic circuit and a network of circuits are examined. Different alternative methods are considered. The possibility of detection of gravitational waves from cosmic sources is analyzed. Requirements are formulated on the technical parameters of the detectors, which give hope to the possibility of detection of gravitational waves.
Show AbstractIn this paper the equations of motion of particles in an external field are obtained on the basis of the Dirac Lagrangian, and a relativistic expression for the Glauber propagator is found.
Show AbstractThe problem of the nonlinear filtering of a sample in order to obtain the optimum estimate (in the sense of the maximum-likelihood method) of the scattering nonuniformity of the density of the medium, and the velocity of sound in it when the primary field source has a known form in the presence of five types of interference with a normal distribution and with known second-moment matrices is solved.
Show AbstractThe processes in a Rayleigh gas with a two-component light gas, with arbitrary (quasi-) stationary (isotropic) distribution functions of the light components and with arbitrary (isotropic) initial distribution functions of the heavy particles—structureless or harmonic oscillators, are investigated. Using generalized thermodynamic potentials of the heavy component with a nonequilibrium "thermostat," and a generalization of the production of entropy, a number of the theorems of thermodynamically irreversible processes (which assumes the possibility of a thermodynamic description of nonequilibrium systems) are generalized to essentially nonequilibrium systems (to which the thermodynamic description is inapplicable).
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