Eurasian journal of physics and functional materials: Недавние поступления

Отображаемые элементы 61-80 из 80

    • Electron-hole capture centers in an irradiated K2SO4 -Cu crystal 

      Nurakhmetov, T.N.; Salikhodzha, Zh.M.; Bakhtizin, R.Z.; Zhunusbekov, A.M.; Kainarbay, A.Zh.; Daurenbekov, D.H.; Sadykova, B.M.; Zhangylyssov, K.B.; Yussupbekova, B.N. (2019)
      The methods of vacuum-ultraviolet and thermal activation spectroscopy were used to measure the excitation spectra of impurity radiation in the fundamental absorption band of K 2 SO 4 -Cu crystals at 15 K and 300 K. An energy transfer was detected from the base to Cu + impurities. The band gap of crystals K 2 SO 4 was estimated. In K 2 SO 4 -Cu crystals, recombination radiation ...
      2023-12-04

    • An analysis of cross-sections of 9Be + 28Si interaction in the framework of the double-folding model 

      Kabyshev, A.M.; Kuterbekov, K.A.; Azhibekov, A.K.; Bekmyrza, K.Zh.; Mukhambetzhan, A.M.; Kenzhebek, M.K.; Sovetkhanov, Ye.K.; Yeltay, Zh.A. (2019)
      In this paper the experimental data on the differential cross sections for elastic scattering of 9 Be ions on 28 Si nucleus at the energies of the incident nucleus ranging from 12 to 201.6 MeV were analyzed in the framework of the double-folding model using the Paris NN-potential CDM3Y. A good agreement with the experimental angular distributions of differential cross sections ...
      2023-12-04

    • Shell model calculations for deformed Li isotopes 

      Azhibekov, A.K.; Samarin, V.V.; Kuterbekov, K.A.; Naumenko, M.A. (2019)
      The nuclear shell model and its application to studying the structure of nuclei with deformed and spherical shapes are discussed. Calculations of level energies and wave functions in the shell model of deformed and spherical nuclei are performed for 7,8,11Li nuclei. A detailed calculation scheme for solving the radial Schrodinger equation is presented.
      2023-12-04

    • Setup for the study of the paramagnetic resonance of neutrons of the first kind 

      Tsulaia, M.I.; Berikov, D.B.; Salamatin, I.M.; Mareev, Yu.D.; Kopatch, Yu.N.; Zhumadilov, K.Sh. (2018)
      The experimental setup KOLKHIDA has been designed to study the interactions of polarized neutrons with polarized nuclei, in particular to study the neutron nuclear precession (nuclear pseudomagnetism) and also for studying magnetic properties of crystals. The investigation has been performed at the Frank Laboratory of Neutron Physics, JINR.
      2023-12-04

    • Ecologically safe experimental purpose application of microwaves in the treatment of chronic neurological disorders: optimization and risks 

      Arkhypova, K.; Nosatov, A.; Nurushev, M.; Krasov, P.; Fisun, A.; Nurusheva, A. (2018)
      Current paper describes the experimental dual-purpose application of microwaves in a controlled clinical trial on optimizing therapy for chronic neurological disorders. As a part of integrated treatment, low-intensity microwave-assisted blood modification has been used. It represents a physiotherapeutic method based on the autologous blood transfusion (self-blood treatment) ...
      2023-12-04

    • Decreasing of the concentration quenching of fluorescent dye in a solution by introducing it to nanoparticles of silicon dioxide 

      Mantel, A.I.; Yensebayeva, A.E.; Smatov, S.B.; Irgibayeva, I.S. (2018)
      The technique of introduction a fluorescent dye Tris(bipyridine)ruthenium (II) chloride into nanoparticles of silicon dioxide in isopropyl alcohol was tested. The preparation of nanoparticles was carried out by means of the Stober method. The optimal reaction conditions were determined. It was found out that the penetration of a dye into silicon dioxide nanoparticles reduced ...
      2023-12-04

    • Investigation of the stability of nanostructures to degradation 

      Petrov, A.V.; Kenzhina, I.E.; Kozlovskiy, A.L.; Kadyrzhanov, K.K. (2018)
      The paper presents the dependence of the degradation degree in various aggressive media and time in a medium. The greatest deterioration in crystallographic characteristics of nanostructures in corrosive media is observed on the day 10th , which is due to partial destruction of the crystal structure as a result of oxidation processes. Also, an increase in the oxygen concentration ...
      2023-12-04

    • A brief review of conductivity and thermal expansion of perovskite-related oxides for SOFC cathode 

      Nikonov, A.V.; Kuterbekov, K.A.; Bekmyrza, K.Zh.; Pavzderin, N.B. (2018)
      Cathode materials with mixed ion-electron conductivity (MIEC) are necessary for the development of low or intermediate temperature solid oxide fuel cells. Perovskite and perovskite-related materials are promising candidates on this role. In the review the conductivity and the thermal expansion of materials with various types of perovskite-related structures such as pure ...
      2023-12-04

    • Phase analysis, thermal and thermoelectric properties of nanocrystalline Na0.15Cu1.85S, Na0.17Cu1.80S, Na0.20Cu1.77S alloys 

      Balapanov, M.Kh.; Kubenova, M.M.; Kuterbekov, K.A.; Kozlovskiy, A.; Nurakov, S.N.; Ishembetov, R.Kh.; Yakshibaev, R.A. (2018)
      Synthesis, X-ray phase analysis, electron microscopy and investigations of the thermoelectric and thermal properties of nanocrystalline copper sulfide alloys contained sodium are presented. At room temperature, the alloys are a mixture of three phases of copper sulfide - the monoclinic phase of Na2Cu4S3 , the hexagonal phase of Cu2S and the cubic phase of Cu9S5 (digenite). The ...
      2023-12-04

    • Synthesis and investigation of optical properties of CdSe quantum dots with high quantum luminescence yield 

      Kainarbay, A.Z.; Nurakhmetov, T.N.; Salikhodja, Z.M.; Zhunusbekov, A.M.; Daurenbekov, D.K.; Sadykova, B.; Yussupbekova, B.; Zhanylysov, K.; Kainarbayeva, A.; Adalbek, N.; Shaken, N.; Turmakhanbetova, A.; Balabekov, K.N. (2018)
      In the present work, an attempt to obtain quantum dots with a high quantum luminescence yield has been made. For this purpose, the existing methods of synthesis have been studied; approbation of availability and reproducibility of the results and possibility of obtaining luminescent QD samples in the required spectral region has been made. The optical characteristics, the ...
      2023-12-04

    • Analysis of ( 11Li+ 9Be)-reaction in the framework of the time-dependent Schrodinger equation 

      Azhibekov, A.K.; Kuterbekov, K.A.; Samarin, V.V. (2018)
      Neutron transfer and nucleus breakup cross sections in ( 11Li + 9Be) -reaction are calculated at energy range up to 32 MeV/nucleon. The evolution of probability density of external weakly bound neutrons of 11Li and the probabilities of neutron transfer and nucleus breakup are determined based on a numerical solution of the time-dependent Schrodinger equation. Our calculation ...
      2023-12-04

    • Study of influence of mobile phone irradiation to tooth enamel EPR spectra 

      Zhumadilov, K.Sh.; Ivannikov, A.I.; Stepanenko, V.F.; Hoshi, M. (2017)
      The contribution of mobile phones influence on electron spin resonance (EPR) spectra formation and electromagnetic noise signal for accuracy of dose estimation on example of tooth enamel samples measurements was investigated for low dose range. The spectra of irradiated tooth enamel samples in doses from 0 to 500 mGy have been measured. The spectra have been processed by ...
      2023-12-04

    • SOFC: Prospects of development 

      Kuterbekov, K.A.; Bekmyrza, K.Zh.; Nikonov, A.; Paranine, S.; Lipilin, A.; Baitassov, T.; Nygymanova, A. (2017)
      One of the main conditions for the transition to hydrogen energy is development of reliable, high-performance and cost-effective fuel cells, in which chemical energy is converted directly into electrical energy. The advantages of solid oxide fuel cells (SOFC) are: high electrical efficiency (50 - 60)%, in cogeneration with thermal energy the efficiency may reach 90%, and high ...
      2023-12-04

    • Ionizing radiation as a powerful tool for modification of metallic nanostructures 

      Kadyrzhanov, K.K.; Kozlovskiy, A.L.; Mashentseva, A.A. (2017)
      This paper presents a case study of targeted modification of the structure and properties of zinc nanotubes ordered arrays by treatment with Xe +22 and Kr +17 swift heavy ions (SHI). Polyethylene terephthalate track-etched membranes (PET TeMs) with a pore density of (4 × 10 9 ) ions/cm 2 have been used as a template for electrochemical deposition of Zn. Scanning electron ...
      2023-12-04

    • Preparation and characterization of down-shifting film for silicon solar cell based on the stilben 420, PVA polymer and silver nanoparticles 

      Mantel, A.; Irgibaeva, I.; Aldongarov, A.; Barashkov, N. (2017)
      We have developed method of preparation of luminescent polymer films based on polyvinyl alcohol (PVA), organic dyestilben 420 (St420) and silver nanoparticles (AgNPs). Concentration of St420 which provides most efficient luminescence quantum yield was determined for PVA film. It was found that addition of 10 nm AgNPs to St420 samples in PVA leads to increase of absorption ...
      2023-12-04

    • Neutron-removal cross sections of 6,8He, 8Li and 9,10Be nuclei 

      Hue, B.M.; Isataev, T.; Lukyanov, S.M.; Mendibaev, K.; Artukh, A.G.; Aznabayev, D.; Borcea, C.; Cuong, P.V.; Erdemchimeg, B.; Klygin, S.A.; Kononenko, G.A.; Kuterbekov, K.A.; Maslov, V.A.; Ostashko, V.; Penionzhkevich, Yu.E.; Rotaru, F.; Sereda, Yu.; Vorontsov, A.N.; Thiep, T.D. (2017)
      Neutron-removal cross-section ( σ−xn ) measurements of neutron-rich light nuclei were performed on the COMBAS fragment-separator with a multi-detector Si telescope at intermediate energies (22-34) MeV/nucleon. The removals of one neutron from 8 Li and 9 Be, two neutrons from 6 He and 10 Be and four neutrons from 8 He were observed from the reactions on a Si-CsI(Tl) telescope. ...
      2023-12-04

    • α-particle emission in the reaction 48Ca+Ta at Coulomb energy 

      Mendibaev, K.; Hue, B.M.; Lukyanov, S.M.; Aznabayev, D.; Borcea, C.; Maslov, V.A.; Penionzhkevich, Yu.E.; Rotaru, F.; Sivacek, I.; Skobelev, N.K.; Smirnov, A.A.; Kuterbekov, K.A. (2017)
      Inclusive energy spectra have been measured for light charged particles emitted in the bombardment of Ta target by 48Ca ions at 261 MeV and 471 MeV. The reaction products were analyzed and detected by means of a ( ∆E × E ) telescope placed in the focal plane of a magnetic spectrometer located at forward angles with respect to the beam direction. In all the reactions studied ...
      2023-12-04

    • New insight into the cluster structure of 9Be by reactions with deuteron beam 

      Lukyanov, S.M.; Denikin, A.S.; Naumenko, M.A.; Burjan, V.; Trzaska, W.H.; Harakeh, M.; Etasse, D.; Kroha, V.; Mrazek, J.; Mendibayev, K.; Sivacek, I.; Glagolev, V.; Piskor, Š.; Penionzhkevich, Yu.E.; Skobelev, N.K.; Stefan, I.; Verney, D.; Kuterbekov, K.A.; Zholdybayev, T. (Eurasian Journal of Physics and Functional Materials, 2017)
      Angular distributions of protons, deuterons, tritons and alpha particles emitted in the reaction 2H + 9Be at E lab =19.5 MeV were measured with an aim to shed light on the internal cluster structure of 9 Be and to study possible cluster transfer of 5 He. The analyses suggest a significant contribution of five-nucleon transfer in the reaction channel 9Be ( d , 4He ) 7Li .
      2023-12-04

    • Effect of lithium doping on electrophysical and diffusion proper-ties of nonstoichiometric superionic copper selenide Cu1.75 Se 

      Balapanov, M.Kh.; Kuterbekov, K.A.; Kubenova, M.M.; Ishembetov, R.Kh.; Akhmetgaliev, B.M.; Yakshibaev, R.A. (Eurasian Journal of Physics and Functional Materials, 2017)
      The results of studies of the ionic conductivity and the conjugated chemical diffusion coefficients (CCDC) in the nonstoichiometric LixCu1.75Se (0 ≤ x ≤ 0.25) ternary alloys are presented. It has been observed that the values of the ionic conductivity of Cu1.75Se copper selenide decreases with lithium doping in general owing to increasing the the activation energy. The increasing ...
      2023-12-04

    • КУЛЬТУРНО-ЯЗЫКОВАЯ АДАПТАЦИЯ РЕПАТРИАНТОВ –КАЗАХОВ В УСЛОВИЯХ ВУЗОВСКОГО ОБУЧЕНИЯ 

      Агманова, А.Е. (Евразийский национальный университет имени Л.Н. Гумилева, 2017)