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Information × Registration Number 0216U001021, 0111U009552 , R & D reports Title Research of radiation processes in crystalline targets, study of properties of coherent bremsstrahlung beams and research of processes of collision of protons and heavy ions in the field of ultra relativistic energies popup.stage_title Head Maslov Mykola Ivanovich, Кандидат фізико-математичних наук Registration Date 05-01-2016 Organization National Science Center "Kharkiv Institute of Physics and Technology popup.description2 It was carried out the numerical description in GEANT 3 and GEANT 4 and experimental measurement of the spectral and dosimetric characteristics of the radiation that has passed through layers of materials with different nuclear charges Z, and thickness. Layers of materials were interchanged. It was measured and calculated values of the coefficients that determine the noncommutativeness of quanta passing through the heterogeneous layers of two or three materials. It was simulated spectra for different incident radiation, in the experiments it was the radiation sources 241Am, 57Co, 137Cs, 60Co, 90Sr-90Y. The range of energies in experiments with the passage of gamma-quanta was 60 keV - 1.33 MeV. It is shown that: - multi-layer protection for electrons and gamma quanta, as a rule, more effective in the case of arrangement of a light material to the radiation source at energy range of 0.2-20 MeV; - the difference in the passage of gamma rays and electrons is about 2-3 times and depends on the energy of incident radiation and the thickness of the protective material. Noncommutativeness of radiation passage increases with the growth of build-up factor (thickness); - when the energy of incident radiation close to the energy of K-, L - absorption edge for heavy item there is the effect due to CXR generation, when the defense is more effective in the case of location of a heavy material to the radiation source. This effect is most significant for thin foils. Product Description popup.authors Бочек Георгій Леонідович Бурдейний Дмитро Дмитрович Васильєв Геннадій Петрович Ганенко Володимир Борисович Деєв Олексій Степанович Кіпріч Сергій Костянтинович Каплій Олександр Андрійович Мазілов Олексій Олександрович Маслов Микола Іванович Муравська Світлана Володимирівна Овчинник Володимир Дмитрович Потін Сергій Михайлович Шуліка Максим Юрійович Яловенко Володимир Іванович popup.nrat_date 2020-04-02 Close