München 2019 – wissenschaftliches Programm
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K: Fachverband Kurzzeit- und angewandte Laserphysik
K 9: Poster
K 9.7: Poster
Donnerstag, 21. März 2019, 16:30–18:30, Durchgangshalle
Temporal and spatial characteristics of valence holes created by X-ray irradiation in LiF — •Vladimir Lipp1, Nikita Medvedev2,3, and Beata Ziaja1,4 — 1Center for Free-Electron Laser Science (CFEL) at DESY, Hamburg, Germany — 2Institute of Physics, Academy of Science of Czech Republic, Prague, Czech Republic — 3Institute of Plasma Physics, Academy of Science of Czech Republic, Prague, Czech Republic — 4Institute of Nuclear Physics, Polish Academy of Sciences, Krakow, Poland
Our in-house classical Monte-Carlo simulation tool XCascade-3D [1] follows the electron cascades in time and space for the case of low X-ray fluences. Given the parameters of the X-ray beam, the model calculates spatial and temporal distributions of the electrons and core-shell and valence holes in various X-ray-irradiated materials, including LiF. For this material, the model provides the final distribution of the created valence holes. These holes, after self-trapping, via exciton decay mechanism, contribute to the creation of long-living defects called color centers. Therefore, the present calculations should enable us to establish a connection between the spatial distribution of the X-ray-induced color centers in LiF and the spatial shape of the X-ray beam, as suggested in [2] -- with potential experimental applications. References: [1] Lipp, Medvedev, Ziaja, Proc. SPIE 10236, 102360H (2017). [2] Pikuz, Faenov, Matsuoka et al., Scientific Reports 5, 17713 (2015).