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Information × Registration Number 0224U033190, (0124U002155) , R & D reports Title Processes of scattering and characteristic X-ray radiation of relativistic charged particles in oriented crystals popup.stage_title Розвиток методу комп’ютерного моделювання ХРВ заряджених частинок в орієнтованих кристалах. Розвиток методу комп’ютерного моделювання процесу руху заряджених частинок у кристалі в моделі бінарних зіткнень. Побудова аналітичного опису процесу розсіювання швидких заряджених частинок на періодичній системі кристалічних площин з точністю до лінійних доданків ейконального наближення нульового порядку Head Trofymenko Serhii V., Доктор фізико-математичних наук Registration Date 20-12-2024 Organization National Science Center "Kharkiv Institute of Physics and Technology" popup.description1 The aim of the work is to study orientational effects in motion, scattering and characteristic X-ray radiation of high-energy particles in crystals and to develop a new method for determining the crystal orientation with respect to the incident particle beam and a new method for studying the process of particle dechanneling in a crystal based on characteristic radiation registration. popup.description2 A method for numerical modelling of the number of photons of characteristic X-ray radiation (CXR) produced during the motion of a high-energy charged particle in an oriented crystal is elaborated. It is based on the method of equivalent photons and the expression for the probability of the atomic K-shell ionization by the particle as a function of the impact parameter. A formula for the number of the atomic K-shell ionization events and the corresponding number of emitted CXR photons per unit path is obtained, depending on the instantaneous location of the particle relative to the atoms in the crystal lattice. The system of equations of motion of relativistic particles in the potential of the field of many atoms, optimised for numerical calculations, is obtained. On the basis of this system, a method of numerical modelling of the process of relativistic particle motion in a crystal in the binary collision model is elaborated, which allows taking into account thermal vibrations of atoms in the simulation. An analytical description of the scattering process of fast charged particles on a periodic system of parallel atomic planes with a uniform distribution of atoms in each plane is constructed with an accuracy of terms linearly depending on the potential in the phase of the wave function in the eikonal approximation. The differential scattering cross sections in this approximation are obtained. Product Description popup.authors Kyryllin Ihor V. Malovytsia Maksym S. Omelchenko Viktoriia D. popup.nrat_date 2024-12-20 Close