http://repository.enu.kz/handle/enu/10879 2026-04-04T01:59:56Z http://repository.enu.kz/handle/enu/10888 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. 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. 2022-01-01T00:00:00Z http://repository.enu.kz/handle/enu/10887 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. 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 obtained for purified quantum dots. Based on the experimental data, the nucleation time of quantum dots, optimal methods of synthesis and growth control is determent. HRTEM images showed the average size of ZnSe quantum dot, the calculated band gap is 2.84 eV. 2022-01-01T00:00:00Z http://repository.enu.kz/handle/enu/10886 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. 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 brass alloy of the studied ingots, as well as inner voids and cavities as a possible result of the gas output during casting process. The patina, as a cuprite phase, occupy volumes to 8 % of the volumes of the ingots. 2022-01-01T00:00:00Z http://repository.enu.kz/handle/enu/10885 Study of bound and resonance states of 11Be in breakup reaction Valiolda, D.S.; Janseitov, D.M.; Melezhik, V.S. 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 section of 11 Be. The obtained results are in good agreement with existing experimental data at 69 MeV/nucleon. The developed computational scheme opens new possibilities in investigation of Coulomb, as well as nuclear, breakup of other halo nuclei on heavy, as well as, light targets. 2022-01-01T00:00:00Z