Основной целью «Узбекского физического журнала» является доведение до широкого научного сообщества новых результатов теоретических и экспериментальных исследований в различных областях современной физики, полученных учеными Узбекистана и зарубежных стран.
| Nashriyot | Ўзбекистон Республикаси Фанлар академияси |
|---|---|
| Shahar | Toshkent |
| ISSN | 1025-8817 |
| e-ISSN | 2181-077X |
| Tashkil etilgan | 1957 |
| Nashr davriyligi | annual international symposium on ph |
| Maqolalar soni | 430 |
| OAK holati | Ro‘yxatda |
The high efficiency of using the Raman spectroscopy method in complex investigations of a number of physical properties of research objects has been demonstrated. On the example of the analysis of the Raman spectra of…
The electrical conductivity of the SAV-1 structural alloy, irradiated with fast neutrons with a fluence of 1017–1019 n/cm2 , was investigated in the temperature range 290–480 K. A nonlinear dependence of the specific…
The article presents the results of research using the instrumental neutron activation analysis for monitoring the state of environment in the Tashkent region and the Tashkent city. Data on the macro- and microelement…
In this work, we studied the effect of electron irradiation on the structure and morphology of the surface of a single crystal and polycrystal TlIn1-xCrxS2 (x=0.01). Irradiation of a TlIn1-xCrxS2 single crystal with…
he structural properties of thin-film solid solutions (GaAs)1-х(Ge2)x grown by liquid-phase epitaxy on GaAs single crystal substrates are studied. The resulting epitaxial layers had a thickness of 10 µm, a resistivity…
In this work, we consider the experimental data on the oxidation of the silicon surface in vacuum with subsequent annealing obtained by total current spectroscopy. Studies have shown that when using temperature…
The effect of multiple exciton generation in low dimensional nanostructures by a single photon presents a possible route to improved photovoltaic conversion efficiency. In this work, the Fermi`s statistical theory of…
Numerical and analytical results of studying the effect of size quantization of single-particle entropy in a two-dimensional electron gas in semiconductor materials with a nonparabolic conduction band are presented. The…
A nonadiabatic collective model of nonaxial even-even nuclei with quadrupole and octupole deformations is developed. Transverse quadrupole and octupole deformations are taken into account effectively. And longitudinal…
Recently, we have derived an approximate analytic formula for the ground state energy of (2D) charged anyon gas. This result allows us in the present paper to estimate the exchangecorrelation energy, which is as it is…
The paper presents the results of research on the development, manufacture, calibration and testing of acoustic emission (AE) system for non-destructive control and monitoring of the states of concrete structures of…
The increase in material removal rates and the quality of electrical discharge machining expands the possibilities of full-scale application of dielectric in industry. However, in the existing works, the dependence of…
The method of express-analysis of triethoxysilane and tetraethoxysilane, which are intermediate products of chemical reactions occurring in the framework of the silane technology for the synthesis of polycrystalline…
The paper presents the results of the study of a series of objects of electrical devices and archaeological heritage by the method of neutron radiography and tomography (VL-10 diode, spark plug, bell, ancient ring…
The effect of ion doping on the secondary emission characteristics of Mo, Pd and Pd-Ba alloy has been investigated. It was found that as a result of doping with low-energy barium ions, an intermetallic compound of the…
Highly crystalline Sb2Se3 films from a separate sources of Sb and Se elements at a substrate temperature of 500°С were obtained by chemical molecular beam deposition (CMBD) method. The effect of the Sb/Se composition…
In this work, thin films of Mn4Si7 were grown by the methods of magnetron and laser sputtering of bulk manganese silicide Mn4Si7 on the surface of various substrates (Si, SiO2, sitall, and mica), the optimal modes of…
We have developed an end-to-end simulation model for the light-emitting diode-pumped solidstate laser using the Monte Carlo photon tracing technique. The model considers complete specifics and spectral characteristics…
Using the MOPAC 2016 software package, the vacancy mechanism of ionic conductivity in LaF3 crystals inside their bulk and on the surface is investigated. It is shown that the ionic conductivity over the crystal surface…
The Stebler-Wronsky effect in amorphous silicon is considered theoretically. It is shown that the available experimental results can be correctly interpreted within the framework of the concepts of spin chemistry…
Model experiments on the scattering of hydrogen atoms by the surface of a carbon nanotube (nanotube temperature 300 K, 600 K) were carried out using molecular dynamics methods (ReaxFF, LAMMPS). In particular, the…
An experimental setup for the plasma-chemical synthesis of tungsten carbide nanopowders has been developed, which allows the nanopowder to be obtained directly from tungsten oxide to create nanostructured hard alloys…
The dynamics of changes in the values of the refractive index of solutions of C60 in xylene at various concentrations has been studied by the refractometric method. It was found that the deviation from the linear form…
The wide application of organic nanocrystals requires a deeper understanding of their nucleation mechanisms. In particular, the onset of nucleation still needs to be elucidated, although tremendous efforts have already…
The growth of multilayer structures with Ge0.3Si0.7-yGey/Si heterojunction at tin content from 0 to 18% was studied. The X-ray diffractometry method shows the presence of strict periodicity of layers and a high level of…
The stability of the polyelectrolyte of anti-adhesive compound was increased by adding SiO2 nanoparticles with a concentration of 0.1 to 1.0 wt%. We used Aerosil SiO2 nanoparticles with a size of 100−200 nm, the size…
In the experiments of Fourier IR spectrometry we studied the swelling mode of the Nafion polymer membrane in water poured into cuvette, the characteristic size of which is on the order of the membrane thickness. The…
In this work, we have developed an organic solar cell from a new synthesized polymer PTBFD based on a two-dimensional conjugated polymer of the donor-acceptor type and comparatively investigated its characteristics with…
One of the most important technological parameters in the gas-phase preparation of epitaxial silicon Si/Si or heterostructures of the Si-Ge/Si type is the halogenide content in semiconductor deposited from the gas phase…
In this work, by implantation of Ni+ ions in Si in combination with annealing the nanocrystalline phases and layers of NiSi2 were obtained in near surface Si layer at the depth of 15−25 nm. At D = 8×1016 cm−3 , a…
The theory of the shape of the line of size-phonon absorption of light in a size-quantized cylindrical semiconductor wire is developed. It is shown that the size-phonon absorption contains a square logarithmic…
Here we present the results of our study on the feasibility of a multi-pass pumping scheme in solar lasers. A secondary concentrator has been developed to ensure the multiple passage of solar photons through the active…
This paper describes methods for synthesizing different nanostructures of ZnO in aqueous solutions at low temperatures and examines the effect of the size of the synthesized samples on the photoluminescence (PL)…
The effect of electron irradiation up to fluence of 1.54×1017 electron/cm2 on the structural parameters, sizes of nanocrystallites, microstrains, and Raman spectra of a single-walled carbon nanotube (SWCNT) was studied…
The temperature dependence of a resistance in solid solution Ga(1-х)MnхAs with the x=0.0156 have been presented. It was established that the temperature dependence of the resistance measured along the crystal axes [110]…
A numerical calculation of the temperature dependence of the chemical potential for various values of the filling factor n of the Landau level is carried out. The degree of filling of each Landau level is found as a…
The degrees of polarization of diffusively transmitted and diffusively reflected backward radiation due to multiple scattering in layers of turbid medium with a finite optical thickness when the medium was excited by…
In this paper, the nature and behavior of small-scale perturbation modes in disc-shaped galaxies were considered. The gravitational instabilities of horizontal small-scale perturbation modes, such as (m;N)=(12;20)…
The paper presents the experimental results of mass-spectrometric studies of the regularity of surface ionization of stimulants. Mass-spectra of these substances, temperature dependences of ion currents were obtained…
The possibility of obtaining highly dispersed powders of amorphous silicon dioxide from technogenic metallurgical wastes, which are dump slags of copper-smelting production and dustlike waste of the production of…
By carbothermic reduction of microsilica, which is a highly dispersed technogenic waste from the production of technical silicon and ferrosilicon, containing 95-97 wt.% amorphous silicon dioxide, micro- and nanopowders…
In this work, using mass spectrometric techniques and surface ionization of CsCl molecules, the initial stages of the carbon film growth on the surface of rhenium by the diffusion from the bulk, were studied. It has…
DFT (density functional theory) method in the B3LYP/cc-pVTZ approximation is used to perform quantum-chemical simulation of conformational properties of the propanol molecule. A complete scan of the potential energy…
The EPR spectra of γ- and n-γ-reactor irradiated steatite ceramics SK-1 and SNC has been studied. It is shown that structural defects of the E ′-center type are created in the structure of the SK-1 and SNC ceramics…
The unimolecular decays on all stoichiometrically possible fragmentation channels of the emitted NbnOm− clusters under sputtering of niobium surface by Xe+ ion beams and blowing by oxygen have been studied. The…
The energy parameters of the process of thermal disordering of the crystal lattice in superionic crystals of the LaF3 type are investigated. A new approach to the interpretation of the energy parameters of internal…
The article is devoted to the presentation and discussion of the primary results of an experimental study of the possibility of using the modern "transient photoconductance method" and "noncontact quasi-steady state…
The Kane model is used to calculate the cyclotron mass of an electron in an InAs quantum well. The calculations were carried out in the approximation of infinity of the depth of the quantum well, taking into account the…
For irradiation of neoplasms located near vital radiosensitive structures and organs, it is necessary to ensure precise spatial alignment of the beam with the target in proton therapy sessions. The aim of this work is…
The cross sections for the formation of isomeric states in the reactions (γ, n) and (n, 2n) on the 81Br nuclei were measured by the induced activity method. The energy dependences of the isomeric ratio of the yields of…