On athermic mechanism of materials radiation embrittlement

To elucidate the mehanisms of radiation embrittlement of materials the temperature dependence of mechanical properties of irradiated materials has been studiedyesBelgorod State Universit

Special features of the nonlinear dynamics of quasiparticles in molecular structures with hydrogen bonds with allowance for the interaction of not only the nearest neighbors

yesThe dynamics of propagation of protons along a molecular chain of hydrogen bonds is analyzed with allowance for the interaction of the first and second neighbors in the proton sublattice. It is demonstrated that two new charge density excitation types (quasiparticles) arise in this system for which exact analytical dependences are found. The propagation velocity of one of these excitations is high enough, which explains the high mobility of protons along the chain of hydrogen bondsBelgorod State Universit

Wave scattering by defects in media with spatial Dispersion and nonradiative dynamic solitons

Specific features of dynamic solitons in a nonlinear system described by a differential equation with a fourth-order spatial derivative are discussed. Solutions of the linearized equation and the problem of scattering of a doublepartial wave by a point defect are analyzed. Conditions of existence of a nonradiative soliton are formulated and demonstrated in the case in which the natural soliton frequency falls within the continuous spectrum of harmonic oscillations of the examined system. These conditions are determined by the dispersion law of linear oscillationsyesBelgorod State Universit

Single-phase model of recrystallization of molybdenum activated by diffusion of nickel impurities

yesA new model of the activated recrystallization of molybdenum under the diffusion action of a nickel coating is proposed. In the context of this model, dependences of the thickness of the recrystallized layer and of the velocity of motion of the recrystallization front on the annealing time have been derived analyticallyBelgorod State Universit

Specific features of particle scattering and excitation of quasilocal states by a stationary flux in a two-level system

For a simple model it is demonstrated that the Fano or conventional resonance occurs in systems with a two-level defect depending on the defect parameters. Conditions of the Fano and conventional resonance are analyzed. The problem of a system response to a stationary flux specified on the entire axis by a traveling wave has been solved. It has been found that this flux excites a quasilocal state in the continuous spectrum. Bands of amplitudes of the functions of system response to the stationary flux completely determine the quasilocal state spectrumyesBelgorod State Universit

Single-phase model of recrystallization of molybdenum activated by diffusion of nickel impurities

A new model of the activated recrystallization of molybdenum under the diffusion action of a nickel coating is proposed. In the context of this model, dependences of the thickness of the recrystallized layer and of the velocity of motion of the recrystallization front on the annealing time have been derived analyticallyyesBelgorod State Universit

Localization of waves near the interface between nonlinear media with spatial dispersion

yesBelgorod State Universit

Specific features of particle scattering and excitation of quasilocal states by a stationary flux in a two-level system

yesFor a simple model it is demonstrated that the Fano or conventional resonance occurs in systems with a two-level defect depending on the defect parameters. Conditions of the Fano and conventional resonance are analyzed. The problem of a system response to a stationary flux specified on the entire axis by a traveling wave has been solved. It has been found that this flux excites a quasilocal state in the continuous spectrum. Bands of amplitudes of the functions of system response to the stationary flux completely determine the quasilocal state spectrumBelgorod State Universit

Nonlinear collective excitations in quasi-one-dimensional structures with spatial dispersion

yesIt is demonstrated that a description of the effects of higher-order dispersion of continuous oscillations calls for a consideration of interactions with the nearest and more distant neighbors in a crystal lattice. Exact soliton and periodic solutions of the nonlinear equation with fourth-order derivatives describing long-wavelength collective excitations in a quasi-one-dimensional chain have been foundBelgorod State Universit

Forced capillary waves in the pool covered with a thin film

yesForced capillary waves are investigated in the pool of finite dimensions within the framework of linear dynamics of an incompressible liquid. Analytical expression for the velocity potential of the liquid in such waves is derived. It is demonstrated that amplitude poles of the forced capillary waves determine the frequency spectrum of free capillary wavesBelgorod State Universit