Журналы: Недавние поступления

Отображаемые элементы 141-160 из 167

    • Current status of the new fragment separator ACCULINNA-2 and the first-day experiments 

      Gorshkov, A.V.; Belogurov, S.G.; Bezbakh, A.A.; Biare, D.; Beekman, W.; Chudoba, V.; Fomichev, A.S.; Golovkov, M.S.; Gazeeva, E.M.; Grigorenko, L.V.; Kaminski, G.; Krupko, S.A.; Mauyey, B.; Muzalevsky, I.A.; Nikolskii, E.Yu.; Parfenova, Yu.L.; Serikov, A.; Sidorchuk, S.I.; Slepnev, R.S.; Sharov, P.G.; Ter-Akopian, G.M.; Wolski, R.; Zalewski, B. (2019)
      The commissioning of the new fragment separator ACCULINNA-2 at FLNR JINR is accomplished. The separator is destined to expand the possibilities in studies of dripline nuclei performed with the exotic secondary radioactive ion beams (RIBs) at energies of (5 – 50) AMeV. The projected high transmission and purification level were confirmed experimentally for a number of RIBs in ...
      2023-12-04

    • DFT calculation of optical properties of new neutral hexacoordinated Si(bzimpy)2 complexes 

      Bimukhanov, A.N.; Aldongarov, A.A.; Schmedake, T.A. (2019)
      We consider optical properties of 4 neutral hexacoordinated Si(bzimpy) 2 complexes, containing the 2,6- bis(benzimidazol-2 ′ -yl) pyridine ligand using DFT method. The geometrical parameters of the optimized cluster structures, the electronic absorption spectrum, and the molecular orbitals of the structures under consideration are discussed. The effect of addition of the ...
      2023-12-04

    • The effect of irradiation with swift heavy ions on the structural and morphological properties of beryllium oxide ceramics 

      Kozlovskiy, A.L.; Ryskulov, A.E.; Uglov, V.V.; Kislitsin, S.B. (2019)
      In this study the results of structural and morphological changes in Ni 12+ heavy ion irradiated BeO ceramics are presented. Irradiation was carried out on DC-60 heavy ion accelerator using Ni 12+ ions with an energy of 100 MeV with irradiation fluence of 10 13 -10 14 ions/cm 2 . It has been determined that change in magnitude of atom displacements from lattice sites is ...
      2023-12-04

    • Total reaction cross sections of neutron-rich light nuclei measured by the COMBAS fragment-separator 

      Erdemchimeg, B.; Artukh, A.G.; Davaa, S.; Hue, B.M.; Isataev, T.; Klygin, S.A.; Kononenko, G.A.; Khuukhenkhuu, G.; Lukyanov, S.M.; Mikhailova, T.I.; Maslov, V.A.; Mendibaev, K.; Sereda, Yu.M.; Penionzhkevich, Yu.E.; Vorontzov, A.N. (2019)
      Preliminary results of measurements of the total reaction cross sections σR for nuclei 4 He, 6 He, 8 He, 7 Li, 8 Li, 9 Li, 11 Li, 7 Be, 9 Be, 10 Be, 11 Be, 12 Be, 8 B, 10 B, 11 B and 12 B nuclei at energy range (10-50) AMeV with 28 Si target is presented. The secondary beams of light nuclei were produced by bombardment of the 15N (50 AMeV) primary beam on Be target and separated ...
      2023-12-04

    • Break-up reactions of 6Li, 7Be and 8B 

      Issatayev, T.; Lukyanov, S.M.; Sereda, Yu.M.; Artukh, A.G.; Aznabayev, D.; Borcea, C.; Calinescu, S.; Erdemchimeg, B.; Hue, B.M.; Kabyshev, A.M.; Klygin, S.A.; Kononenko, G.A.; Kuterbekov, K.A.; Mendibayev, K.; Ostashko, V.V.; Penionzhkevich, Yu.E.; Rotaru, F.; Thiep, T.D.; Vorontsov, A.N. (2019)
      Secondary beams ( 6 Li, 7 Be, 8 B) were obtained by the separation of fragmentation products of a 15 N ion beam (50 MeV/A) impinging on a Be target using the COMBAS spectrometer. The secondary products were detected by a telescope consisting of five Si-detectors (dE) and a stop CsI(Tl) detector. The telescope allowed us to achieve unambiguous particle identification of fragments ...
      2023-12-04

    • The effect of high-temperature annealing on the phase transformations of the perovskite YTiO3−x system 

      Mustakhieva, D.A.; Zhumataeva, I.Z.; Kozlovsky, A.L.; Kadyrzhanov, K.K. (2019)
      This paper presents the results of a study of the structural characteristics of perovskite systems based on YTiOx. These samples were subjected to heat treatment in the process of solid-phase synthesis. The change in physicochemical properties was investigated by scanning electron microscopy, X-ray structural and energy dispersive analysis. In the course of the work, it was ...
      2023-12-04

    • MD and TEM evaluation of swift Xe ion induced latent tracks in Si3N4 

      Rymzhanov, R.A.; Zhalmagambetova, A.; Ibrayeva, A.; Janse van Vuuren, A.; O’Connell, J.H.; Skuratov, V.A. (2019)
      As known silicon nitride ceramics is considered as a candidate material for inert matrix fuel hosts used for transmutation of minor actinides. Unfortunately, by now very limited data is devoted to investigate of its stability under high energy heavy ion irradiation simulating fission fragment impact. Aim of our present study is a comparative analysis of parameters of latent ...
      2023-12-04

    • 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