Перегляд за автором "Fedorets, I.D."

Сортувати за: Порядок: Результатів:

  • Application of gamma activation analysis for research of Cs and I diffusion into a glassceramic matrix 
    Dikiy, N.P.; Gabelkov, S.V.; Dovbnya, A.N.; Lyashko, Yu.V.; Medvedeva, E.P.; Saenko, S.Yu.; Surkov, A.E.; Tarasov, V.V.; Uvarov, V.L.; Fedorets, I.D.; Holomeev, G.A.; Borovlev, V.I.; Zabolotny, V.D.; Medvedev, D.V. (Вопросы атомной науки и техники, 2006)
    Nuclear reactions ¹³³Cs(γ,n)¹³²Cs, ¹²⁷I(γ,n)¹²⁶I were utilized for research of Cs and I diffusion in glassceramic matrices. The glassceramic matrix was manufactured with the help of hot isostatic pressing at 910°C and ...
  • Cesium, strontium and sodium diffusion in magnesium kalium phosphates system 
    Dikiy, N.P.; Dovbnya, A.N.; Lyashko, Yu.V.; Medvedev, D.V.; Medvedeva, E.P.; Repikhov, O.A.; Saenko, S.Y.; Shkuropatenko, V.A.; Tarasov, R.V.; Fedorets, I.D.; Khlapova, N.P. (Вопросы атомной науки и техники, 2014)
    Nuclear-physical methods have been used for determination of diffusion coefficient of Cs, Na, Sr and Ga in samples on the basis of Ceramicrete which contained simulators of a liquid radioactive waste of "Hanford-1", KW and ...
  • Excitation of isomeric low-lying level of nucleus ¹⁸¹Ta by relativistic electrons 
    Dikiy, N.P.; Dovbnya, A.N.; Lyashko, Yu.V.; Nikiforov, V.I.; Uvarov, V.L.; Fedorets, I.D. (Вопросы атомной науки и техники, 2013)
    Influence on efficiency of exciting of the E1-level ¹⁸¹Ta with energy 6.24 keV of neutron-capture reaction and photonuclear processes by means of the processes caused by passage of powerful electron beam through tantalum ...
  • Gamma-activation method for the element analysis of agricultural products after vacuum drying 
    Dikiy, N.P.; Kutovoy, V.A.; Kutovoy, S.V.; Lyachko, Yu.V.; Medvedeva, E.P.; Medvedev, D.V.; Nikolaenko, A.A.; Onishchenko, N.I.; Uvarov, V.L.; Fedorets, I.D.; Grytsan, L.D. (Вопросы атомной науки и техники, 2004)
    Development of the combined technologies of drying allows one to speed up the process of moisture moving away from the dried material and to decrease the energy consumption per the production unit. The composition of macro- ...
  • Influence of high-energy electrons irradiation on nanoceramics properties of zirconia 
    Aizatskyi, M.I.; Dikiy, N.P.; Dovbnya, A.N.; Fedorets, I.D.; Kushnir, V.A.; Lyashko, Yu.V.; Medvedev, D.V.; Mytrochenko, V.V.; Onishchenko, I.N.; Perezhogin, S.A.; Pelichatyi, N.M.; Danilenko, I.A.; Konstantinova, T.E. (Вопросы атомной науки и техники, 2013)
    Radiation defects in nanoceramics zirconia were investigated after electron irradiation with energy 41…89 MeV up to doze 2.28…5.7·10¹⁴ electrons/cm². Radioactive isotopes ⁸⁷,⁸⁸Y, ⁸⁸,⁸⁹,⁹⁵Zr, ⁹⁵Nb, ¹⁷⁵Hf are registered after ...
  • Investigation of granite rocks radiation-chemical durability 
    Dikiy, N.P.; Dovbnya, A.N.; Lyashko, Yu.V.; Medvedeva, E.P.; Sayenko, S.Yu.; Tarasov, R.V.; Uvarov, V.L.; Kholomeyev, G.A.; Shevyakova, E.P.; Fedorets, I.D. (Вопросы атомной науки и техники, 2002)
    Gamma-activation analysis is used to study dynamics of leaching of various elements from granite samples. The sample preliminary irradiation and activation was carried out in the field of bremsstrahlung of electron ...
  • Ion exchange in photoactivated inorganic matters 
    Dikiy, N.P.; Dovbnya, A.N.; Lyashko, Yu.V.; Medvedev, D.V.; Medvedeva, E.P.; Parhomenko, Yu.G.; Uvarov, V.L.; Fedorets, I.D. (Вопросы атомной науки и техники, 2017)
    The effects of monovalent and bivalent impurities on the diffusive mobility sodium, caesium and strontium in magnesium potassium phosphate hexahydrate and clinoptilolite were analysed. It was determined that ratio of ...
  • Men-made radionuclides in lichens and mosses of the Kharkiv region 
    Dikiy, N.P.; Lyashko, Yu.V.; Medvedeva, E.P.; Katalevskaya, D.S.; Medvedev, D.V.; Parkhomenko, Yu.G.; Yatsuk, M.A.; Fedorets, I.D. (Вопросы атомной науки и техники, 2016)
    Проведено вимірювання питомої активності радіонуклідів у ґрунті, моховинні, лишайниках, листяних деревах та хвойній фітомасі. Вивчені особливості надходження и накопичення радіонуклідів ¹³⁷Cs, ⁴⁰К, ²²⁶Ra та інших у ...
  • Nanostructural deactivating agents selective to caesium 
    Dikiy, N.P.; Dovbnya, A.N.; Lyashko, Yu.V.; Medvedeva, E.P.; Medvedev, D.V.; Uvarov, V.L.; Fedorets, I.D.; Khlapova, N.P.; Bakay, D.S. (Вопросы атомной науки и техники, 2011)
    The chemical reactivity of nanostructural clinoptilolite and γ-hematite which have highly selective for ¹³²Cs sorption from polyethylene surface and for liquid environments are studied. There are different components besides ...
  • Nuclear-physical methods of analysis of noble metals and rare-earth elements 
    Dikiy, N.P.; Borovlev, V.I.; Zabolotny, V.D.; Lyashko, Yu.V.; Medvedeva, Y.P.; Slabospitsky, R.P.; Fedorets, I.D.; Shlyakhov, N.A. (Вопросы атомной науки и техники, 2001)
    A summary of the analysis noble and rare metals by combined methods is presented. The electrodeposition of gold at a carbon film and Rutherford backscattering was used for determination its in ores. The sorbents and particle ...
  • Nuclear physics techniques for determination of rocks age 
    Dikiy, N.P.; Dovbnya, A.N.; Lyashko, Yu.V.; Medvedeva, E.P.; Medvedev, D.V.; Uvarov, V.L.; Fedorets, I.D.; Valter, A.A.; Storishko, V.E. (Вопросы атомной науки и техники, 2004)
    The low background nuclear physics techniques were used for measure age geologic samples of micas (biotite, lepidolite, muscovite, phlogopite) by means of detection a gamma radiation from radioisotopes. The nuclear reactions ...
  • Photonuclear production of F-18 
    Dikiy, N.P.; Dovbnya, A.N.; Krasnoselsky, N.V.; Lyashko, Yu.V.; Medvedeva, E.P.; Medvedev, D.V.; Uvarov, V.L.; Fedorets, I.D. (Вопросы атомной науки и техники, 2018)
    ¹⁸F is one of the most important positron emitters which are routinely used in the positron emission tomography (PET). The recoil nuclei method in the ¹⁹F(Ɣ,n)¹⁸F reaction was used for the production of ¹⁸F free carrier. ...
  • Photonuclear production of Yb-175 
    Dikiy, N.P.; Dovbnya, A.N.; Krasnoselsky, N.V.; Lyashko, Yu.V.; Medvedeva, E.P.; Medvedev, D.V.; Uvarov, V.L.; Fedorets, I.D. (Вопросы атомной науки и техники, 2017)
    The use of photonuclear nanotechnology makes it possible to obtain the ¹⁷⁵Yb isotope with acceptable characteristics without the content of impurities of other isotopes. Irradiation of Yb₂O₃ nanoparticles of a natural ...
  • Production of medical isotopes at electron accelerators 
    Dikiy, N.P.; Dovbnya, A.N.; Lyashko, Yu.V.; Medvedeva, E.P.; Tur, Yu.D.; Uvarov, V.L.; Fedorets, I.D.; Pashchuk, S.A.; Evseev, I.G. (Вопросы атомной науки и техники, 2000)
    A brief summary of the production medical isotopes by powerful linac electron accelerator is presented.
  • Radiative stability and sorption ability of clinoptilolite nanoparticles 
    Dikiy, N.P.; Dovbnya, A.N.; Lyashko, Yu.V.; Medvedev, D.V.; Medvedeva, E.P.; Fedorets, I.D. (Вопросы атомной науки и техники, 2015)
    The ion exchange of clinoptilolite nanoparticles by means of a radioactive isotope ¹³²Cs was studied. The caesium capacity for clinoptilolite nanoparticles at size 90 nanometers at reaching of an equilibrium was 55 mg/g.
  • Radioactive enhancement of methanol conversion by zinc oxide nanoparticles 
    Dikiy, N.P.; Dovbnya, A.N.; Fedorets, I.D.; Khlapova, N.P.; Lyashko, Yu.V.; Medvedeva, E.P.; Medvedev, D.V.; Uvarov, V.L.; Gavrik, A.P. (Вопросы атомной науки и техники, 2011)
    On the example of a model system the methanol conversion on activated ZnO nanoparticles is investigated at room temperature. Activation of ZnO nanoparticles is carried out by bremsstrahlung at Egmax=22 MeV and I=500 mA. ...
  • Radionuclide accumulation by objects of ecosystem 
    Dikiy, N.P.; Dovbnya, A.N.; Lyashko, Yu.V.; Medvedev, D.V.; Medvedeva, E.P.; Botova, M. A.; Fedorets, I.D. (Вопросы атомной науки и техники, 2014)
    The isotope contents of family uranium and thorium in the ash of wood of trees and pine needles before and after leaching by water were measured. The element contents in the ash of wood of trees and pine needles were ...
  • Radionuclide biosorption by the aquatic plants of Pistia stratiotes 
    Dikiy, N.P.; Dovbnya, A.N.; Lyashko, Yu.V.; Medvedev, D.V.; Medvedeva, E.P.; Botova, M.A.; Khlapova, N.P.; Fedorets, I.D. (Вопросы атомной науки и техники, 2014)
    The activity of leaves and roots of Pistia stratiotes from the Seversky Donets river has been measured. The visible activity of ¹³¹I in roots of plant is found. The content estimate of ¹³¹I in water of Seversky Donets river ...
  • Sorption properties of magnesium-potassium phosphate matrix 
    Dikiy, N.P.; Dovbnya, A.N.; Lyashko, Yu.V.; Medvedev, D.V.; Medvedeva, E.P.; Saenko, S.Y.; Shkuropatenko, V.A.; Tarasov, R.V.; Fedorets, I.D. (Вопросы атомной науки и техники, 2015)
    Sorption characteristics of fine-dispersed magnesium-potassium phosphate ceramics KMgPO₄·6H₂O for immobilization of ¹³⁷Cs was investigated. The Cs specific capacity 2.97 mg/g at pH=4 was detected. The high selectivity of ...
  • The content of natural radioactive isotopes in soil of Kharkov region 
    Dikiy, N.P.; Lyashko, Yu.V.; Medvedeva, E.P.; Medvedev, D.V.; Parhomenko, Yu.G.; Fedorets, I.D. (Вопросы атомной науки и техники, 2017)
    The content and migration of natural radioactive isotopes in some lot of the surface soil of the Kharkiv region have been studied by the help of low background gamma spectroscopy. The migration series of radioactive elements ...