Hannover 2016 – scientific programme
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P: Fachverband Plasmaphysik
P 22: Theory and Modelling III
P 22.3: Talk
Thursday, March 3, 2016, 11:55–12:10, b305
Kinetic simulations of core-hole relaxation in bulk material irradiated by hard x-rays — Beata Ziaja1,2, •Vikrant Saxena1, Sang-Kil Son1, Nikita Medvedev1, Michal Stransky3, Bianka Woloncewicz4, and Benjamin Barbrel5 — 1Centre for Free-Electron Laser Science, DESY, Notkestrasse 85, Hamburg 22607, Germany — 2Institute of Nuclear Physics, Polish Academy of Sciences, Radzikowskiego 152, 31-342 Kraków, Poland — 3Department of Radiation and Chemical Physics, Academy of Sciences of the Czech Republic, Na Slovance 2, 182 21 Prague, Czech Republic — 4Faculty of Mathematics, Physics and Informatics, University of Gdańsk, ul. Wita Stwosza 57, 80-952 Gdańsk, Poland — 5Center for Intense Lasers and Applications, University of Bordeaux 1, 351 Cours de la Liberation, F-33405 Talence, France
Irradiation of bulk material by hard x-rays creates a non-equilibrium state characterized by the presence of core-hole states taking complicated relaxation paths towards ground state configurations. This relaxation process involves a large number of active configurations even in case of moderately heavy atoms (e.g., 1323 configurations for argon). It is computationally challenging to follow them, even with a kinetic approach which is otherwise an efficient approach for simulation of irradiated bulk material. Here, we propose a simplified approach which limits the number of active configurations by restricting the sample relaxation to the predominant relaxation paths. We test its reliability, by performing the full calculation for carbon, and comparing it with the simplified scheme.