The diode laser oscillating modes are identified at which a resolved HF-structure is registered at every sideband, and an equality of the intensities of the sideband spectral components, separated by the clock transition frequency in a rubidium-87 atom, is achieved.

The electromagnetic angular momentum created by the convective fields of electrically charged relativistic particles in the immediate vicinity of the charges, where these fields exceed the fields of the purely electromagnetic radiation, is considered.

A modified method for identifying and studying secular resonances in the dynamics of near-Earth objects is described. Unlike the traditionally used approach based on approximate analytical formulas for calculating secular frequencies that are valid only for small eccentricities, the proposed method uses exact values obtained in the process of numerical simulation of the motion from the Newton–Euler

The experimental data on the plasma etching of Si3N4 for sub-100 nm gate fabrication for high electron mobility transistors (HEMTs) based on InAlN/GaN heterostructures are analyzed. The influence of the plasma etching process parameters on the plasma-induced damage to the InAlN/GaN heterostructure is considered. The possibility of formation of a 70 nm-length gate InAlN/GaN HEMT using low damage reactive

Using spectro-eigenoscopy of multiyear series of observations of the vertical component of the electric field strength in the surface layer of the atmosphere, we have obtained results indicating the evidence of gravitational-wave impact of relativistic double star systems on the global electric circuit of the Earth. A statistically significant increase in the spatial correlations of the Ez components

The paper proposes a computation and theoretical methodology for studying electrokinetic phenomena at the solid-electrolyte interface in terms of the continuum model. The main structure which appears at the solid-electrolyte interface is the double layer. In the system with such a structure, fluid motion can occur. This is because the additional motion of electrolyte in the double layer due to both

We present estimates of the transversal acceleration associated with the Yarkovsky effect for a set of asteroids with small perihelion distance. It is shown that in most cases, this effect leads to a decrease in the confidence region. The motion of asteroid 504181 2006 TC that according to our estimates is most strongly influenced by this effect is studied in detail. Close approaches and apsidal-nodal

High-strength materials containing dispersed Ti3Ni4 particles (d ~ 800 nm) and exhibiting superelasticity (SE) in a wide temperature range from 200 to 450 K were designed by aging at 823 K, 1 h of nickel-rich [001]-oriented Ti–51.8 at.% Ni single crystals. The influence of the stress-assisted austenite aging in different regimes (temperature, applied stress, and time) on the stability of the shape

A Friedmann cosmological model, generalized to the epoch of dominance of dark matter, is considered. Its equation of state is chosen in a new, nonstationary form. Basing our approach on the process of light propagation in such a metric, we have found its refractive index, which turns out to be a constant quantity (or more accurately, one that depends on the epoch of the end of dominance of dark matter)

The paper presents the results of ferromagnetic resonance (FMR) spectrometry of magnetic properties of nanocrystalline thin films obtained by magnetron sputtering of permalloy targets of various composition (NixFe1–x, x = 0.6–0.85). The behavior of the main magnetic properties of the thin film edges is analyzed. Near the film edges, not only the fluctuation of the uniaxial magnetic anisotropy field

A recurrent generalized asynchronous flow of events (generalized MMPP flow) is considered which represents a widespread mathematical model of the flow of elementary particles and information requests in telecommunication and computer networks and belongs to the class of double stochastic flows of events. The functioning of the flow is considered under the conditions of a random unextendable dead time

Copper-cerium nanopowders CuOx–CeO2 (mass ratio Cu:Ce = 6:100) are prepared by mixing the dispersions of the copper and cerium oxides produced by the method of pulse laser ablation (PLA) in liquid, followed by drying. The initial dispersions of copper oxides were prepared by the method of PLA of a metal copper target in distilled water or 1% hydrogen peroxide solution, and those of cerium oxide – by

The paper presents the calculation results of the coplanar waveguide geometry using the method of conformal mapping and computerized simulation with COMSOL Multiphysics software. Ferromagnetic FeNi/Cu/FeNi magneto-sensitive elements are fabricated in one cycle with the coplanar waveguide which conveys drive signals. Magnetodynamics of the obtained film structures is studied within the frequency range

The results of studying the influence of copper phthalocyanine (CuPc) nanostructures on the generation and transfer of charge carriers in the semiconductor polymer poly-(3hexylthiophene) (P3HT) are presented. It is shown that the observed broadening and shift of maxima in the absorption spectra of P3HT upon the addition of nanostructures to the polymer are associated with an increase in the film crystallization

Aging of the Al0.3CoCrFeNi high-entropy alloy single crystals for 50 h at a temperature of 973 K leads to the precipitation of non-coherent non-equiaxed β-phase particles with B2-type ordering, average length l =250–350 nm, width d = 30–45 nm, and interparticle distance L = 500–750 nm. It is shown that the interaction of slip dislocations with β-phase particles is realized by the rounding mechanism

Free oscillations of scalar fields with a Higgs potential are investigated in cosmological models based on scalar fields, both in the case of isolated classical and phantom fields and in the case of an asymmetric scalar doublet. On the basis of numerical modeling, we have found dependences of the period of free oscillations with zero effective energy on the parameters of the field model and have also

An approach to numerical implementation of the diffusion-drift model is described with application to problem of estimating field effects induced in an object by a concentrated moving source. The mathematical model is formalized using initial boundary-value problem for multidimensional evolution equation of convection-reaction-diffusion type. The computational algorithm is based on modification of

The paper focuses on the surfaces electrization of Z-cut single-crystal lithium niobate during the pyroelectric effect. It is shown that the properties of the electric current passing through the surfaces of single-crystal lithium niobate depend on the ground circuit, the rate of temperature change, and orientation of polar axes. Experiments show that grounding of lithium niobate surfaces has an effect

The results of investigation of the possibility of reducing the duration of the second-harmonic radiation pulse generated by the starting complex of an THL-100 laser system by conversion of a pre-chirped fundamental frequency pulse are presented. A front-end compressor of the complex is used to obtain a fundamental harmonic pulse chirp at a central wavelength of 950 nm with duration of 70 fs. It is

Molecular relaxation processes in potassium carbonate (K2CO3) are investigated using Raman-scattering spectroscopy. It is found that the first-order phase transition is temperature-expanded, and the pre-transition phenomena are observed in crystalline K2CO3. The paper gives theoretical grounds for pre-transition phenomena using the theoretical model of tunneling.

In this paper, the mathematical simulation is used to study and analyze the shear zone or plastic deformation at a meso-level in dispersion-hardened crystalline materials with an aluminum matrix and incoherent nanoparticles. This study also considers both the macro-level or the behavior of the flow stress curves and the micro-level or the formation of linear and point defects. It is found that the

The effect of γ′-phase dispersed particles on the temperature dependence of the stresses of the start of martensitic transformations σcr(T), the shape memory effect, and the superelasticity is investigated depending on aging conditions in the [001]-oriented crystals of the non-equiatomic Fe – 28% Ni – 17% Co – 1.5% Al – 2.5% Ti (at.%) high-entropy alloy under tension/compression. It is shown that σcr(T)

The advent of X-pinch based compact radiographs has significantly expanded the application field of pulsed radiography for diagnostics of fast processes. The key point here is the spatial resolution which these radiographs can provide. The method for determining the size of the soft x-ray (SXR) source based on diffraction imaging of opaque metallic wires and their comparison with the diffraction pattern

The spectral-luminescent properties of fluorescent probe laurdan (6-dodecanoyl-2-dimethylaminonaphthalene) in homogeneous solvents of different chemical natures and water-micellar solutions (WMS) of non-ionic Triton Х-100 surfactant are investigated. The relative contributions of the basicity and acidity parameters of the solvents to the laurdan fluorescence band shift are estimated. The use of the

A theoretical and experimental study of the viscoelastic properties of whole blood under oscillating shear stresses has been carried out. Based on ultrasonic elastography, a mathematical model and a method for calculating the complex viscosity coefficient of whole blood during its coagulation have been developed. The complex viscosity coefficient of whole blood and its real and imaginary parts were