Посмотр Выпуск 2022 года по дате публикации

Отображаемые элементы 1-9 из 9

    • Investigation of the temperature and precursors concentration dependence of the formation of ZnSe quantum dots 

      Duisenbay, B.A.; Alibay, T.T.; Akhmetova, A.S.; Zhangylyssov, K.B.; Daurenbekova, R.K.; Kainarbay, A.Zh.; Nurakhmetov, T.N.; Daurenbekov, D.H. (2022)
      Various variations of the synthesis of ZnSe quantum dots are investigated. The influence of temperature, the concentration of precursors and the time of synthesis of quantum dots was taken into account. Aliquot absorption spectra is measured for various time intervals and the dynamics of the growth of ZnSe quantum dots is estimated. Luminescence and absorption spectra were ...
      2023-12-06

    • Study of bound and resonance states of 11Be in breakup reaction 

      Valiolda, D.S.; Janseitov, D.M.; Melezhik, V.S. (2022)
      We investigate the Coulomb breakup of the 11 Be halo nuclei on a lead target within non-perturbative time-dependent approach in a wide range of beam energy (5–70 MeV/nucleon) including the low-lying resonances in different partial and spin states of 11 Be. We have found considerable contribution of the low-lying resonances ( 5/2 + , 3/2 − and 3/2 + ) to the breakup cross ...
      2023-12-06

    • Non-destructive neutron structural studies of ancient ceramic fragments of the cultural heritage of the Republic of Kazakhstan 

      Bakirov, B.A.; Zhomartova, A.Zh.; Kichanov, S.E.; Zhumatayev, R.S.; Toleubayev, A.T.; Nazarov, K.M.; Kozlenko, D.P.; Nazarova, A.M. (2022)
      The structural features of ancient ceramic fragments dating from various historical ages of ancient cultural groups inhabiting the territory of modern Kazakhstan were studied using optical microscopy, neutron diffraction, neutron tomography, and Raman spectroscopy methods. Fragments of ancient pottery were selected from the collection of ancient remains from archaeological ...
      2023-12-06

    • Evaluation of threshold conditions for latent track formation in nanocrystalline Y2Ti2O7 

      Ibrayeva, A.; Mutali, A.; O’Connell, J.; Sohatsky, A.; Skuratov, V.; Alekseeva, L.; Korneeva, E.; Rymzhanov, R. (2022)
      We present the first report on the structural effects induced by swift xenon ions in nanocrystalline pyrochlore Y2Ti2O7 (outside the metal matrix) studied using high resolution transmission electron microscopy. Latent amorphous tracks were observed in the range of electronic stopping powers 4.8–23.2 keV/nm. Obtained results enabled estimation of the threshold energy loss values ...
      2023-12-06

    • Synthesis, X-ray phase analysis and differential thermal analysis of nanocrystalline superionic KxCu1.85S (x<0.05) copper sulfides 

      Sakhabayeva, S.M.; Balapanov, M.Kh.; Kuterbekov, K.A.; Ishembetov, R.Kh.; Kubenova, M.M.; Giniyatova, Sh.G.; Nurkenov, S.A.; Akhmetgaliev, B.M.; Zeleev, M.Kh.; Yakshibaev, R.A.; Seisenbayeva, G.S. (2022)
      Superionic semiconductor chalcogenides with mixed electronic-ionic conductivity have very low lattice thermal conductivity and are excellent thermoelectrics. Doping with other elements is one of the methods for optimizing the useful properties of a material. In this work, nanosized polycrystalline alloys of nonstoichiometric Cu1.85S copper sulfide with a low content of potassium ...
      2023-12-06

    • Analysis procedures in deriving of the differential cross section of the reaction pp → {pp}sπ0 at energies 1.6–2.4 GeV 

      Baimurzinova, B.S.; Tsirkov, D.A. (2022)
      The reaction pp → {pp}sπ 0 , where {pp}s denotes a diproton, i.e. an unbound interacting proton pair in the 1S0 , state, was investigated in order to obtain a differential cross section dσ/dΩ at small angles in the energy range 1.6–2.4 GeV. This work is intended for the presentation of the main procedures in the processing of experimental data.
      2023-12-06

    • Measurements of uranium in urine samples of uranium workers and inhabitants of nearby settlements in Akmola Region, Kazakhstan 

      Aumalikova, M.N.; Ibrayeva, D.S.; Zhumadilov, K.Sh.; Bakhtin, M.M. (2022)
      The main purpose is determine and evaluate uranium concentration in urine of the inhabitants of nearby settlement of uranium mining sites and workers of uranium processing sites. As uranium enterprises working in Stepnogorsk of Akmola Region and its exploitation could be a risk of radiation exposure for the workers as well as for the local population, monitoring of biosamples ...
      2023-12-06

    • Photoluminescence and thermoluminescence in a Li2SO4 crystall 

      Nurakhmetov, T.N.; Zhunusbekov, A.M.; Kainarbay, A.Zh.; Daurenbekov, D.H.; Tolekov, D.A.; Sadykova, B.M.; Temirkulova, N.I.; Zhangylyssov, K.B.; Alibay, T.T.; Shamieva, R.K.; Manat, A.A.; Kabadulla, T.M. (2022)
      The nature of intrinsic emission and the creation of electron-hole trapping centers in irradiated with ultraviolet and X-rays at 15 K and 300 K was investigated in Li2SO4 by methods of spectroscopy. It is shown that in activated Li2SO4 with an energy of 6 ÷ 12.4 eV, emission appears in a wide spectral range to excite rare earth ions that are used as UV sources. These same photons ...
      2023-12-06

    • Structural studies of the brass ingots from the Shcherbet historical complex of the Lower Kama region: neutron diffraction and tomography studies 

      Zhomartova, A.Zh.; Shaykhutdinova, E.F.; Bakirov, B.A.; Kichanov, S.E.; Kozlenko, D.P.; Sitdikov, A.G. (2022)
      The structural characteristics and phase composition of several ancient brass ingots obtained in the archeological Shcherbet complex has been studied using neutron diffraction and tomography methods. The XRF analysis and neutron diffraction provide high zinc content up to 30 wt.%. The neutron tomography yielded 3D data of the spatial distribution of chemical elements in the ...
      2023-12-06