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Information × Registration Number 0221U103061, 0118U002048 , R & D reports Title Modelling the structure, creating and studying the properties of monochromators for new sources of X-ray radiation popup.stage_title Head Zubariev Yevhenii M, Registration Date 13-02-2021 Organization National Technical University "Kharkiv Polytechnic Institute" popup.description2  Object of research: Dispersing elements with a very high level of X-ray reflection coefficient for the formation of photon beams in the energy range 0.2-50 keV. Purpose: controlled creation of new dispersing elements, development on their basis of a beam line for new sources of X-rays. Research methods: theoretical - Jacobian matrix methods, Peresad-Sirkin method, linear and nonlinear Schr?dinger equations; experimental - X-ray fluorescence spectrometry, X-ray diffractometry, X-ray reflectometry, electron microscopy. Phonon spectra of graphite intercalated with metals (Ca, Yb) were calculated by theoretical methods. The optimal range of Borman crystal thickness t = 8 ? 10 and characteristics of high-energy X-ray beam are theoretically calculated and experimentally determined: peak transmission coefficient ? 4 ? 5%, contrast 200, energy resolution Е/Е at the level 3 ? 6 10-3. The experimental value of the atomic form factor Fhhh prints (hhh) for the fullerene molecule was determined. A special vacuum unit has been created, which is equipped with a quasi-closed volume cell with an automatic heating system. Monochromators based on thick monocrystalline fullerite films with a high reflection coefficient were obtained and tested. A new effect of increasing the reflection coefficient of thick fullerite films under the influence of X-rays has been revealed. A series of samples of high-performance pyrographite intercalated with potassium, С8К - С60К was obtained. Phase and structural transformations are investigated, the diffusion coefficient of potassium in pyrographite is determined. Kinetic curves of the deintercalation process are constructed. The fundamental possibility of creating monochromators on the basis of intercalated pyrographite is determined. Product Description popup.authors Baturin Oleksiy A Borisova Svetlana S Zubarеv Evgeniy M Likakh Viktor O Mamon Valentine V Mikhailov Igor F Mikhailov Anton I Sevryukova Viktoria A Sirkin Evgen S Surovitskiy Serhiy V Fomina Larisa P popup.nrat_date 2021-02-13 Close