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Articles 1 - 16 of 16
Full-Text Articles in Physics
Rapid Radiological Analysis Of Building Materials, Askar Safarov, Joseph Sharonov, Ali Mukhamedov, Askarali Azimov, Akmal Safarov, Mukhammad Salimov, B Radzhabboev
Rapid Radiological Analysis Of Building Materials, Askar Safarov, Joseph Sharonov, Ali Mukhamedov, Askarali Azimov, Akmal Safarov, Mukhammad Salimov, B Radzhabboev
Scientific Journal of Samarkand University
Measurements of the dose-forming radionuclide concentrations such as Rа-226, Тh-232 and К-40 were carried out in samples of building materials with different ageing times. The radium equivalent activities of the samples were determined. Possible values of the correcting coefficients to the activity of Ra-226 that take into account the radioactive equilibrium were calculated. This, in turn, allows to perform rapid radiological analysis of building materials.
About Calculation Of Characteristics Of The Single-Particle States Of The Deformed Nuclei In The Woods-Saxon Potential. Software Package, Joseph Sharonov, Anatoliy Ivanov
About Calculation Of Characteristics Of The Single-Particle States Of The Deformed Nuclei In The Woods-Saxon Potential. Software Package, Joseph Sharonov, Anatoliy Ivanov
Scientific Journal of Samarkand University
Adaptation of CALDNU and MATREL programs of JINR (Dubna) for calculation of characteristics of the single-particle states in the deformed nuclei and calculation of the single-particle matrix elements of the spin-multipole and multipole-multipole operators for the modern personal computers is made. Translation from Fortran-CERN to Fortran PowerStation version 4.0 is made. Additions are made to the program MATREL for calculation of matrix elements of the j2 operator.
Laser Photoionization Spectroscopy Of Rydberg And Autoionization States Of Rare-Earth Atoms., Nafas Eshkabilov, Sh. R. Xaydarov, Anvar Kurbaniyazov
Laser Photoionization Spectroscopy Of Rydberg And Autoionization States Of Rare-Earth Atoms., Nafas Eshkabilov, Sh. R. Xaydarov, Anvar Kurbaniyazov
Scientific Journal of Samarkand University
Systematic studies of Rydberg and autoionization states of rare-earth atoms are carried out. The exact values of the ionization potentials of all lanthanides were determined, and the relationships between the ionization potential of atoms and the number of lost valence electrons during multistage laser photoionization were investigated. The physical mechanisms of the formation of spike and smooth, asymmetric autoionization resonances in near-threshold and long-range autoionization spectra of rare-earth atoms are established.
Studying The Kinetics Of The Decomposition Of Sulfur-Containing Phosphorits By Nitric Acid, M. M. Sobirov, Sh. V. Raxmonov, T. S. Urozov, A. Aslanov
Studying The Kinetics Of The Decomposition Of Sulfur-Containing Phosphorits By Nitric Acid, M. M. Sobirov, Sh. V. Raxmonov, T. S. Urozov, A. Aslanov
Scientific Journal of Samarkand University
The kinetics of decomposition of sulfur-containing phosphorits was studied at a rate of 40-100% nitric acid. It has been established that the decomposition process of sulfur-containing phosphorits acid is easy to implement, the components interact within 2.5-30 minutes. The main part of sulfur-containing phosphorits decomposes within 10 minutes
Attenuation Of Ultrasonic Waves And Acoustic Gruneisen Parameter In Aluminum Alloys, F. R. Axmedjanov, A. F. Boltabayev, E. N. Kurtaliyev, J. T. Nazarov
Attenuation Of Ultrasonic Waves And Acoustic Gruneisen Parameter In Aluminum Alloys, F. R. Axmedjanov, A. F. Boltabayev, E. N. Kurtaliyev, J. T. Nazarov
Scientific Journal of Samarkand University
Attenuation of acoustics waves and Grüneisen parameter has been investigated in AMG-2 and SAV-1 aluminum alloys used as a construction material in nuclear reactors. The measurements of attenuation coefficient of longitudinal acoustics waves were carried out by the echo pulse method at frequencies 10 and 30 MHz and temperature range 290 – 580 K. The maximum observed in temperature dependence of attenuation coefficient is explained by different relaxation mechanisms
Laser Spectoscopy Of Mandelstems - Brillian Scattering In Aqueous Nonelectrolyte Solutions, L. M. Sabirov, D. I. Semenov, X. S. Xaydarov, F. R. Sabirov
Laser Spectoscopy Of Mandelstems - Brillian Scattering In Aqueous Nonelectrolyte Solutions, L. M. Sabirov, D. I. Semenov, X. S. Xaydarov, F. R. Sabirov
Scientific Journal of Samarkand University
In this work we developed a method of laser spectroscopy to study the frequency shift of Mandelshtam-Brillouin components in the fine structure of Reyleigh line, which are origin due to the pressure fluctuations. The method allows to study a character of hypersound (~109 Hz)propagation in a critical region of a thermodynamic instability. Analysis of a complex of experimental material , presented in the paper, allows one to conclude that in aqueous solutions of non-electrolytes at critical concentration there is a whole structural transformations in solutions at the singular point temperature in “temperature-concentration” coordinates
Guidelines For Studying The Dynamics Of Nanostructural Phenomena In Liquids By Dynamic Light Scattering., Shavkat Esirgapovich Qarshiboyev, Lionard Sabirov, Leonid Chaikov, Marina Kirichenko
Guidelines For Studying The Dynamics Of Nanostructural Phenomena In Liquids By Dynamic Light Scattering., Shavkat Esirgapovich Qarshiboyev, Lionard Sabirov, Leonid Chaikov, Marina Kirichenko
Scientific Journal of Samarkand University
The paper describes the principles of correlation spectroscopy of scattered light and a method for determining the size of particles suspended in a liquid using such spectroscopy - the method of dynamic light scattering (DLS). Some features of the application of the DLS method are considered.
Investigation Of Trajectrory And Angular Distributions Scattered Ar Ions From The Defect Inp(001) Surface, U.O. Kutliyev
Investigation Of Trajectrory And Angular Distributions Scattered Ar Ions From The Defect Inp(001) Surface, U.O. Kutliyev
Scientific Journal of Samarkand University
The Ar + ions scattering from the defect InP(001)<110>, <ī10>surfaces at the grazing incidence have been simulated by the computer simulation method. The trajectory and angular distributions of scattered argon ions on above mentioned surface semichannels have been calculated.
Parameter Of Elastic Anisotropy In Bismuth Silicate Crystals, F.R. Akhmedjanov, U.A. Saidvaliev, U.U. Tukxtaev, J.T. Nazarov
Parameter Of Elastic Anisotropy In Bismuth Silicate Crystals, F.R. Akhmedjanov, U.A. Saidvaliev, U.U. Tukxtaev, J.T. Nazarov
Scientific Journal of Samarkand University
The elastic anisotropy parameter of noncentrosymmetric cubic crystals of bismuth silicate has been investigated. It is shown that they belong to crystals with the negative anisotropy of elastic moduli of the second order. Comparison of the experimental results with the values of the velocities of acoustic waves calculated through the introduced anisotropy parameter shows a good agreement.
Spectra Of One – And Two Photon Excited Luminescence Of Medical Drugsin Photon Traps, A.K. Kubanov, D.I. Semenov
Spectra Of One – And Two Photon Excited Luminescence Of Medical Drugsin Photon Traps, A.K. Kubanov, D.I. Semenov
Scientific Journal of Samarkand University
A technique for studying the photoluminescence spectra of pharmaceuticals (analgin, paracetamol) was developed for single- and two-photon excitation by a pulse-periodic laser. The technique is based on the fiber-optic recording of photoluminescence spectra using a small-size spectrometer, quartz light guides, and mini cavity cuvettes, which makes it possible to compare the analyzed spectrum with the spectrum of the reference substance.
Laser Spectroscopy Of Ultra-Small Concentration Of Atoms And Aerosols In Various Phase States Of Substance, А.Т. Xalmanov
Laser Spectroscopy Of Ultra-Small Concentration Of Atoms And Aerosols In Various Phase States Of Substance, А.Т. Xalmanov
Scientific Journal of Samarkand University
In this work it is given studying of dynamics and types of physical processes with excited atoms and molecules in atomizer of "graphite furnace". Physical mechanism of increasing atomic-ionization signal for two stepwise excitation schemes was shown. It is shown that the maximum signal is observed for In atoms at the transition 5p 2 Р3/2→6s 2 S3/2→8p 2 P1/2 and for Li, Na, Ag, Au, Pt atoms at the transition (n)s→(m)p→(k)d respectively (where n, k, m and f principal quantum numbers of states). In the result in the experiment photoionization collisional ionization and mechanisms were developed. The results are show …
Radionuclides In Dry Atmospheric Deposition In 2017 In Tashkent, Samarkand And Karshi, А.К. Muhamedov, B.Kh Niyozov, L.T. Nurmuradov, А.А. Safarov
Radionuclides In Dry Atmospheric Deposition In 2017 In Tashkent, Samarkand And Karshi, А.К. Muhamedov, B.Kh Niyozov, L.T. Nurmuradov, А.А. Safarov
Scientific Journal of Samarkand University
We used gamma-spectrometry method to investigate dependence of radionuclide contents of dry atmospheric fallout in Tashkent, Samarkand and Qarshi from natural and technogenic factors.
Shaping Electrons’ Bremsstrahlung Beam Using Two Slit Collimators, Т.М. Muminov, R.R. Muratov, К.М. Norbaev, А.А. Safarov
Shaping Electrons’ Bremsstrahlung Beam Using Two Slit Collimators, Т.М. Muminov, R.R. Muratov, К.М. Norbaev, А.А. Safarov
Scientific Journal of Samarkand University
Formation of bremmstrahlung beams of the MT -22S microtron (Nuclear Physics Lab, Samarkand State University) using coaxial distanced slit collimators was studied. Experimental angular distributions of γ-quanta of the beam was compared with results of simulation.
Radiation-Optical And Thermo-Radiation Phenomena In Laser Phosphate Glasses Coactivated With Neodimium And Cerium Oxides, E.M. Ibragimova, M.K. Salakhitdinova, A.N. Salakhitdinov, A.A. Yusupov
Radiation-Optical And Thermo-Radiation Phenomena In Laser Phosphate Glasses Coactivated With Neodimium And Cerium Oxides, E.M. Ibragimova, M.K. Salakhitdinova, A.N. Salakhitdinov, A.A. Yusupov
Scientific Journal of Samarkand University
For laser phosphate glasses activated by pairwise neodymium and cerium ions, a number of radiation-optical effects have been studied: thermal and thermoradiative decolorization in the region of 200-800 nm; jump-like switching of the valence of cerium ions during the valencecoordination change in its oxygen environment. A new conceptual approach is proposed to the mechanism of the thermoradiation effect of gamma irradiation at temperatures of 100- 400 C, leading to the detection of neodymium-neodymium and neodymium-cerium ion-ion coordination interactions in nano-structural complex complexes involving the structure of a glass matrix, Only thermoradiation exposure.
The Wave Function And Energy Levels Of Paticle In A Quantum Dot With Morse Potential, B. Eshpulatov, Sh. Quvandiqov, T. Mustafaev
The Wave Function And Energy Levels Of Paticle In A Quantum Dot With Morse Potential, B. Eshpulatov, Sh. Quvandiqov, T. Mustafaev
Scientific Journal of Samarkand University
Electronic states in the cylindrical quantum dot with Morse confining potential have been theoretically investigated. Analytical expressions for the energy and wave function of particle have been obtained.
Photo Stability Of Solutions Of Some Rodamine Dyes With Carboxyl Group, N. Nizomov, A.A. Jamalova, A.Sh. Yarmuxamedov
Photo Stability Of Solutions Of Some Rodamine Dyes With Carboxyl Group, N. Nizomov, A.A. Jamalova, A.Sh. Yarmuxamedov
Scientific Journal of Samarkand University
The effect of light irradiation on the spectral-luminescent characteristics of some rhodamine dyes with a carboxyl group in solvents of various natures was studied. It has been established that under the influence of light irradiation in aqueous solutions of selected dyes, a decrease in the intensity of absorption and fluorescence with a simultaneous hypsochromic shift of the electronic spectra is observed.Under the same conditions, discolored solutions of rhodamine dyes in a binary solvent mixture of 1% water + 99% DMSO are reduced in color and, accordingly, absorbing and fluorescent capacity. The observed phenomenon is explained by the transition of molecules …