| 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 |
In this work, methods for determining the radiochemical purity and specific activity of the radionuclide lutetium-177 in the form of chloride are considered. These indicators were determined by thin layer and paper…
The article presents the results of the development and creation of a new pilot-industrial installation in the form of an inclined rotary kiln for processing fluoroammonium siliconcontaining materials. It is shown that…
Matrix elements of three- and four-photon optical transitions occurring between the subbandsof the valence band of semiconductor of cubic symmetry are calculated. In this case, the contribution of the simultaneous…
The appearance of thermoelectric power on heated p-n heterostructures containing on the surface of silicon substrates the deposited films from a Si-Ge solid solution heavily doped with titanium was experimentally…
The effect of reactor radiation on the luminescence properties and absorption spectra of single crystals of bismuth germanate Bi4Ge3O12 (BGO) has been studied. It is revealed that the degradation of the luminescent…
The excited collective states of deformed even-even nuclei with quadrupole and octupole deformations have been studied in the framework of the approximation of a nonaxial quadrupoleoctupole rotator. The matrix elements…
In this work, we have studied by numerical methods the evolution of non-radial oscillations of an unsteady disk, which is surrounded by a passive ellipsoidal halo with a uniform density. For this purpose, we have…
The paper presents the results of the detection of active variability and optical oscillations of the general light curves of gravitationally lensed quasars SDSS J1721+8842, SDSS J1433+6007 and SDSS J2145+6345 for the…
Complex qualitative and quantitative studies of the initial product, ethanol, used in the technological process for monosilane synthesis are carried out. Monosilane is subsequently used to obtain nanocrystalline silicon…
The emission of cluster ions of stoichiometric composition AnBm + (n+m≤12) has been studied under ion bombardment of boundary between two different mechanically joined metals A and B. It has been shown that along with…
Applying the set of experimental techniques including dose effect of 60Co γ-quanta, X-ray diffraction, local element analysis on microscale, scanning probe microscopy, optical and FTIR spectroscopy, the Cl deficit and…
Изучено влияние использования внешних преобразователей частоты на интенсивность люминесценция кристалла Nd:YAG. Кристалл освещался светодиодом с материалом Y3Al5O12:Ce3+ и без него в качестве внешнего преобразователя…
Frequency doubling of the first type of interaction (oo-e) of intense short laser pulses in crystals with a regular domain structure is numerically studied. The influences of the dispersion of the medium up to the third…
The paper presents expressions for the concentration of charge carriers in semiconductor nanowires. To find the concentration, the equation for the total number of particles is used. Using the Fermi-Dirac distribution…
The paper presents the results of an assessment of vertical profiles of wind velocity and water amount in the atmosphere over the Maidanak Astronomical Observatory. The height distributions of the meteorological…
This article provides detailed information about the observations of round-the-clock dynamics of the wind regime in different seasons of the year on the Suffa plateau, where RT-70 radio-telescope of the millimeter range…
In this work, the refractometry method was used to study of the molecular interactions and structural characteristics of dimethylformamide-ethanol and cyclohexane-ethanol binary mixtures. The refractive indices of…
The behavior of the chemical potential µ of a two-dimensional electron gas near the bottom of the miniband and far from it is considered. Low-temperature analytical formulas are obtained under the conditions of the…
The formation of the porous aluminum oxide on surface by the electrochemical method was investigated. This phenomenon is associated with simultaneous processes of formation and dissolution of the aluminum oxide in…
A new analytical exact solution of the Einstein gravitational field equations is proposed, which describes the equilibrium state of a spherical layer of anisotropic matter located in an external spherical symmetric…
The root-mean-square displacement of atoms in the new cubic refractory alloy Ti070Mo030C has been determined by the methods of least squares and full-profile analysis based on neutron diffraction data. The values of the…
By the complex methods of labeled atoms (169Er, 170Tm , 153Sm и 175Y b ), autoradiography, measurements of electrical conductivity and Hall effect, isothermal relaxation of capacitance and current, diffusion, solubility…
The results of laboratory experiments to study the effect of reverse bias with a duration of 60, 600 and 2000 s. on the parameters of solar cells (SC) based on an absorbing layer consisting of Cu, In, Ga and Se (CIGS)…
Four parameter group of transformations containing rotations and time translations is consi[1]dered due to spherical symmetry and stationarity of the space-time metric. It is found that there exists such a quartet of…
Within the framework of general relativity, a model of an equilibrium configuration of gravitating object is constructed. The spherical symmetric object studied consists of a spherical layer of a hypothetical…
The phase composition and subsurface current (90−580 K) were studied in expired scintillators made from doped LiF crystals after irradiation with 4 MeV electron fluencies 1013-1015 el/cm2 at beam current densities…
In the article, a fiber coupler based on twin-core fiber formed by the convergence of two light guiding cores by fusion and splicing of a small (several cm) region of the fiber has been proposed and experimentally…
For the first time, the features of the nucleation and further growth of nano- and micro-sized tubes based on C60 fullerene with a hexagonal shape, obtained by evaporation of an isolated drop of a solution of C60 in…
The technique of 3D conformal proton therapy was developed at the Medico-Technical Complex of the Laboratory of Nuclear Problems of the Joint Institute for Nuclear Research to irradiate tumours seated in the vicinity of…