Scattering of the neutrinos by electrons in a static external field at high energies
Scattering of the neutrinos by electrons in a static external field at high energies
A.V. Borisov, M.K. Nanaa, I.M. Ternov
Within the standard model for the Weinberg-Salam electrically weak interactions, the cross section of scattering of the muon neutrinos by electrons in a stationary external field was calculated with due regard for the effect of propagator of the intermediate vector boson. The cross section was studied as a function of invariant kinematic and dynamic parameters, which are determined by the particle energies and the applied field strength.
Show AbstractAn effective refractive index of a randomly inhomogeneous one-dimensional medium
An effective refractive index of a randomly inhomogeneous one-dimensional medium
S.M. Golynskii, V.D. Gusev
A new definition is introduced for an effective refractive index of a randomly inhomogeneous medium, which describes the wave field in the medium. Within the framework of the diffusion approximation, the one-point probability density function of the effective refractive index is found, which makes it possible to calculate any of its statistical characteristics. Conditions for the applicability of these results are established for the case when the medium inhomogeneities have a finite correlation distance.
Show AbstractStimulated Raman backscattering in pulse compression mode: numerical experiment
Stimulated Raman backscattering in pulse compression mode: numerical experiment
S.Yu. Nikitin, D.A. Sivashov
A numerical simulation study of compression of laser pulses based on stimulated Raman backscattering is reported. The compression is studied as depending on the pumping pulse energy and width, the time of dephasing of molecular vibrations, the length of the cell with a Raman-active medium, and the conditions of pumping beam focusing. The calculation results well correlate with the experimental data on stimulated Raman scattering in hydrogen.
Show AbstractNonreciprocal effects and frequency multistability in a solid-state laser with external lighting
Nonreciprocal effects and frequency multistability in a solid-state laser with external lighting
0.E. Nanii, A.B. Selunskii
It has heen shown that additional lighting of a solid-state ring laser from the outside helps produce the initial splitting of the frequencies of contra propagating waves due to nonlinear interaction on saturation gratings induced in the active element. A selective control of the amplitude of the contrapropagating waves by varying the light wave frequency was found to be feasible.
Show AbstractThe effect of magnetic field on the elastic properties of antiferromagnetic chromium
The effect of magnetic field on the elastic properties of antiferromagnetic chromium
A.N. Vasil'yev$^1$, Yu.I. Savchenko$^1$, R.S. Georgious$^2$, E. Fawcett$^3$
Field dependences of velocities of transverse and longitudinal sound in chromium, in the region of spin-reorientation transitions induced by an applied magnetic field, have been studied and analyzed within a thermal activation model. Phase boundaries of states with longitudinal and transverse spin density waves have been established in the magnetic field-temperature diagram.
Show AbstractA study of elastic phenomena and relaxation processes in dysprosium
A study of elastic phenomena and relaxation processes in dysprosium
G.S. Burkhanov, S.A. Nikitin, A.M. Tishin, 0.D. Chistyakov, 0.A. Shipilov
An experimental study of Young's modulus $E$ and the internal friction $Q^{-1}$ in Dy polycrystals of varying purity was carried out in the 4.2-350 K temperature range. A giant maximum of internal friction was found in the region of low temperatures (at T = 37 K and $\nu$ = 2030 Hz the internal friction is $2,15\cdot 10^{-2}$). The internal friction maximum observed in the paramagnetic temperature region had a dislocational origin. The activation energy $E_a$ of this process was 0.38 $\pm 0,05$ eV and the frequency factor $\tau_0= 2.9\cdot 10^{-11}$ s.
Show AbstractSize effect in the anomalous Hall effect
Size effect in the anomalous Hall effect
A.V. Vedyaev, N.G. Karachanskaya, 0.A. Kotel'nikova, N.V. Ryzhanova
The size effect in the anomalous Hall effect (AHE) has been investigated for metal films within the framework of the coherent potential approximation using the Kubo formalism. The classical size effect in the AHE has been calculated for thin ferromagnetic films at low temperatures. A method of calculating kinetic phenomena in films of arbitrary thickness is elaborated that does not impose constraints on the impurity scattering parameters in the bulk and on the surface of the film.
Show AbstractIntermolecular interactions in propyloxycyanobiphenyl dimers
Intermolecular interactions in propyloxycyanobiphenyl dimers
P.V. Shibaev, M.B. Guseva, and B.M. Kostishko
Intermolecular interactions in propyloxycyanobiphenyl dimers have been studied using the modified Rayleigh-Srodinger perturbation theory (MRS) and the method of atom-atom potentials (AAP). The antiparallel orientation of molecules has been found to be energetically favored. According to the MRS and AAP data, the maximum energy gap between the parallel and antiparallel orientations is 5.7 and 2.9 kcal/mole, respectively .
Show AbstractAsymptotic calculation of nonlinear oscillations in an inhomogeneous viscoelastic medium
Asymptotic calculation of nonlinear oscillations in an inhomogeneous viscoelastic medium
G.N. Medvedev and B.I. Morgunov
Oscillations in an inhomogeneous viscoelastic medium have been studied. The medium is characterized by nonlinear physical properties rapidly changing in one direction. The averaging procedure is applied for solving a vibration protection problem.
Show AbstractSynthesis of the planar waveguide junction
Synthesis of the planar waveguide junction
A.N. Bogolyubov and D.V. Minaev
An algorithm was suggested for solving the problem of synthesizing the waveguide junction between two planar homogeneous waveguides.
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