[en] A Coulomb excitation campaign on ^106,108,110Sn at 4.4-4.5 MeV/u was launched at the HIE-ISOLDE facility at CERN. Larger excitation cross sections and γ-ray statistics were achieved compared to previous experiments at ∼2.8 MeV/u. More precise B(E2;0₁⁺ → 2₁⁺) values, lifetimes of states via the Doppler shift attenuation method, and new B(E2;0₁⁺ → 2_x⁺), B(E2;2₁⁺ → 4₁⁺), and Q(2₁⁺) values from the new Miniball data will be obtained and applied to test modern nuclear structure theories. (author)

[en] Compounds of composition Ca₂B^III_2/3UO₆ (B^III = Y, Sm, Eu, Gd, Dy, Ho, Er, Tm, Yb, Lu) were synthesized for the first time by high-temperature reactions in the solid phase. The structures of the compounds were studied by X-ray diffraction

[en] New approach is described to synthesis of biomimetic materials on the basis of hydroxyapatite particles and collagen suspension produced from fish-production wastes. A simultaneous joint in vitro precipitation yields partly mineralized collagen fibrils. The process is similar to the mineralization stage in the case of an in vivo formation of bone tissue. The method for synthesizing a collagen-hydroxyapatite biomimetic composite material can serve as a basis for obtaining materials for the regenerative medicine.

[en] The standard enthalpies of formation of anhydrous 3d-block transition metal uranyl sulfates and their pentahydrates at 298.15 K were determined by reaction calorimetry. The heat capacities of the compounds A^IIUO₂(SO₄)₂·5H₂O (A^II = Mn, Fe, Co, Ni, Cu, Zn) and CuUO₂(SO₄)₂ at 7-300 K were determined by adiabatic vacuum calorimetry, and the thermodynamic functions of these compounds were calculated. The standard entropies and Gibbs energies of formation of these compounds at 298.15 K were determined. The thermodynamics of dehydration of A^IIUO₂(SO₄)₂·5H₂O and of the precipitate-solution equilibria involving these compounds were studied

[en] The Institute of Nuclear Physics in Almaty is elaborating program the aim of which is developing of technology and production of the most important for Kazakhstan radionuclides, radioactive sealed sources and radiopharmaceuticals for used in medicine, industry and in radioecological research in Kazakhstan. Solid and powder targets are irradiated with protons up to 30 MeV and alphas up to 50 MeV using positive ions variable energy isochronous cyclotron. Traditional wet chemistry procedures to extract and purify produced radioisotopes are used. Regular production of Tl-201, Ga-67, Co-57, Cd-109, Pu-237, Y-88, Sr-85 has already started. It is expected to expand the production of radionuclides as to include Fe-55, In-111. I-123, Rd-103 and some other radionuclides

[en] The standard enthalpies of formation of crystalline A^IBUO₅ (A^I = Li, Na, K, Rb, Cs) at 298.15 K were determined by reaction calorimetry. For these compounds, the heat capacities in the range 10 - 300 K were determined by adiabatic vacuum calorimetry, and the thermodynamic functions were calculated. The standard entropies and Gibbs energies of formation at 298.15 K and the standard thermodynamic functions of dissolution of these compounds were calculated

[en] The permittivity components of the liquid crystalline gadolinium complex with Lewis bases and β-diketonates as ligands are measured in the frequency range from 100 Hz to 5 MHz. The magnitude and sign of the dielectric anisotropy of the complex are determined. Two dispersion regions of the permittivities are found in the liquid crystalline phase. The mechanisms responsible for the relaxation phenomena occurring in the sample are established. The dielectric relaxation times, activation energies, and dipole moment of the complex are obtained. The results of the study are compared with the dielectric properties of ytterbium and terbium complexes having the same ligand environment.

[en] The objectives of the present work are to increase thermal stability of cyclotron targets for production of Tl-201 isotope, increase Tl-203 regeneration rate at radiochemical reprocessing of the targets and develop production technology for radiochemical sources based on Rd-103 isotope. Electrochemical coating of copper substrate with Tl increased the beam current at target irradiation from 100 μA to 125 μA. Further increase of the beam current results in sharp decrease of target stability time at irradiation to 15 min at beam current 150 μA. Thermal calculations and tests at the electron-beam stand predict satisfactory stability at such currents. The discrepancy with the irradiation results has not been explained. More accurate specification of regimes for Tl-203 electrochemical recovery from irradiated targets and better matching of the electrolyte composition made it possible to increase the recovery rate up to 99.5%. Before the present Project, the INP had no experience in production of radioactive sources based on Pd-103. Thermo-diffusion extraction of Pd-103 from irradiated rhodium foil has been chosen as a technology-defining method. The process assures good extraction rate and high purity of extracted isotope. Production of Pd-103 sources based on this technology is much simpler compared to the same based on electrochemical processes. (author)

[en] Cyclotrons play an important role for production of 'carrier-free' radioisotopes for various applications in the nuclear medicine, industry, ecology and science. Kazakhstan variable energy isochronous cyclotron, K = 50 MeV, is a 150 cm compact-pole 3 sector positive ion machine. It generates different beams of light ions: protons 6-30 MeV, deuterons 12.5-25 MeV, ³He-ions 18.5-62 MeV, alpha-particles 25-50 MeV. In the last years the cyclotron is rather intensively used for radioisotopes production to meet the needs of the Republic of Kazakhstan. The main users of radioisotope products are the Institutions of Healthcare Ministry and enterprises of oil-chemistry, metallurgy, mining, scientific institutes etc. In this submission a survey on radionuclides production including ²⁰¹Tl, ⁶⁷Ga, ⁵⁷Co, ¹⁰⁹Cd, ⁸⁸Y, ⁸⁵Sr is presented. Practically at all production stages (target preparation, extraction, purification and concentration of a product) original approaches were realized: (1) at target production by means of electrolysis the modes of reverse plating of the material for irradiation and technological layers were finalized, and at ⁶⁷Ga production new extraction with better characteristics were used; that made the deeper purification from zinc, copper and iron possible. At the development of the technologies of the sealed sources production the following results were obtained: (1) ¹⁰⁹Cd production for X-ray fluorescence analysis, and production of experimental samples for Moessbauer sources ⁵⁷Co at rhodium and palladium backings. The tracers ²³⁷Pu, ⁸⁸Y and ⁸⁵Sr used for development of the set of methods for ²³⁹Pu, ²⁴⁰Pu, ⁹⁰Sr and ²⁴¹Am determination in the samples from Semipalatinsk Test Site were produced via nuclear reactions with alpha-particles on ²³⁵U and protons on ⁸⁸Sr, ⁸⁵Rb targets. Produced radiopharmaceutical preparations ²⁰¹Tl chloride and ⁶⁷Ga citrate are supplied to medical centers of Almaty. (author)

[en] The research was done to observe the influence of primary glyoxal on properties of tested drilling mud. Glyoxal was used as a reagent to reduce viscosity and stabilize shale. Drilling mud processing parameters were estimated before and after affecting by glyoxal. Suggested is the method of polysaccharide modification by glyoxal for improving its resistance to microorganisms; carried out the research of bio- and thermal resistance of starchy and xanthan reagents