Observations about the stationary theory of charged particle scattering
Observations about the stationary theory of charged particle scattering
Yu.V. Popov, T.V. Popova
The questions related to the substantive characteristics which differentiate the stationary scattering theory in Coulomb and short-range (nuclear) potential are examined. It is shown that the Coulomb wave function $\varphi_{c}(\mathbf{r}, \mathbf{p})$ cnnot be used in pure form to determine the amplitude of scattering without considering the boundary conditions. An integral representation is found for the amplitude of Coulomb scattering which coincides with the Rutherford amplitude at angles of $\theta \neq 0$.
Show AbstractRadiation of fixed sources of electrical fields in media with instantaneously changing anisotropy
Radiation of fixed sources of electrical fields in media with instantaneously changing anisotropy
V.V. Kolesov
The full energy of radiation of fixed distribution of electrical charges with instantaneous change in the properties of a two-axis crystal is calculated using representation of the tensor of dielectric permittivity of a medium in a covariant form (not a function of the selection of the coordinate system). The optical characteristics of the radiated waves are found in a linear approximation in terms of the small parameter - the degree of anisotropy of the medium, and an expression for the radiation energy in the case when only the degree of anisotropy of the medium is changed is analyzed.
Show AbstractMultidimensional combination of a model of electromagnetic and weak Weinberg-Salam interactions with gravitation: a bosonic sector
Multidimensional combination of a model of electromagnetic and weak Weinberg-Salam interactions with gravitation: a bosonic sector
V.V. Kislov
It is shown within Kaluza-Klein type theories that combination of gravitation and a model of electrically weak Weinberg-Salam interactions is possible even with a six-dimensional Riemann geometry. A new mechanism is proposed for introducing non-Abelian calibrating fields in Kaluza-Klein type theories. It is shown that after dimensional reduction, the initial lagrangian - a six-dimensional scalar curve - coincides with the lagrangian of the bosonic sector of the Weinberg-Salam model along with a four-dimensional gravitational Lagrangian.
Show AbstractA linear theory for a relativistic surface wave generator
A linear theory for a relativistic surface wave generator
A.M. Afonin, V.A. Vdovin, A.D. Poezd
The triggering currents and working frequency of a Cerenkov surface wave generator with a relativistic electron stream are identified in a linear approximation. A one-dimensional stream model and a representation of a retarding system in the form of a chain of connected quadrupoles are used. Interaction on the boundary of the band of transparency of the electrodynamic system is examined. The results of the calculations match well with the experimental data.
Show AbstractRemote measurement of the speed of aerosol streams using a continuous wave СО$_2$-laser
Remote measurement of the speed of aerosol streams using a continuous wave СО$_2$-laser
V.I. Bersenev, V.M. Gordienko, N.N. Kurochkin, A.V. Priezzhev, Yu.Ya. Putivskii
A laboratory model of an automated Doppler lidar for determining the speeds of aerosol streams is described and the results of laboratory measurements are cited. The performed evaluations show the possibility of using this particular system for measuring wind speed in the atmosphere at distances of several hundred meters.
Show AbstractCharacteristics of thermooptical excitation of sound in metals
Characteristics of thermooptical excitation of sound in metals
V.V. Krylov, E.P. Ponomarev, T.V. Shtentsel
The process of exciting sound in metals with absorption in them of intensity-modulated laser radiation is analyzed. Analytical expressions are given for the amplitudes of thesurface andvolumetric acoustical waves excited by the laser beam. The directivity diagrams of the volumetric waves are identified and their dependence on the beam width is investigated. The acquired results are compared with the experimental data.
Show AbstractThe spectrum of a noisy diffracting beam: linear and nonlinear propagation
The spectrum of a noisy diffracting beam: linear and nonlinear propagation
B.S. Azimov, M.M. Sagatov, O.V. Rudenko
The evolution of spectra of diffracting beams of high intensity acoustical noise is investigated. A new method is proposed for theoretical description of diffraction which considers the nonlinearity of the propagation process. The dynamics of transformation of the spectra are traced using numerical calculations on a computer.
Show AbstractThe inverse problem of scattering for a solid in a Born approximation
The inverse problem of scattering for a solid in a Born approximation
V.A. Burov, T.A. Tikhonova
The inverse problem of scattering of sound in slight heterogeneities in an isotropic elastic medium is examined.
Show AbstractAn investigation of electron-stimulated desorption of neutral molecules from gold and palladium surfaces
An investigation of electron-stimulated desorption of neutral molecules from gold and palladium surfaces
G.G. Fedorov
It is established that electron-stimulated desorption (ESD) of carbon dioxide begins at an energy of bombarding electrons equal to 13 eV and then rises linearly with an increase in the energy of the electrons. A hypothesis is advanced about the mechanism for oxidation of carbon monoxide on the surface of gold and of palladium during ESD.
Show AbstractThe photoconductivity of relaxation semiconductors with correlational defects
The photoconductivity of relaxation semiconductors with correlational defects
Yu.P. Drozhzhov
The temperature and lux-ampere characteristics of photoconductivity are calculated. A relation between the parameters of a defect and the energies of activation of photoconductivity is found.
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