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Tracing X-ray-induced formation of warm dense gold with Boltzmann kinetic equations
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SYSNO ASEP 0545288 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Článek ve WOS Title Tracing X-ray-induced formation of warm dense gold with Boltzmann kinetic equations Author(s) Ziaja, B. (PL)
Bekx, J.J. (DE)
Mašek, Martin (FZU-D) RID, ORCID
Medvedev, Nikita (FZU-D) ORCID, RID
Piekarz, P. (PL)
Saxena, V. (DE)
Stránský, Michal (FZU-D)
Toleikis, S. (DE)Number of authors 8 Article number 224 Source Title European Physical Journal D. - : Springer - ISSN 1434-6060
Roč. 75, č. 8 (2021)Number of pages 10 s. Language eng - English Country DE - Germany Keywords warm dense matter ; creation by X-ray irradiation of bulk gold ; simulations using the Boltzman kinetic eguation approach Subject RIV BL - Plasma and Gas Discharge Physics OECD category Fluids and plasma physics (including surface physics) R&D Projects LTT17015 GA MŠMT - Ministry of Education, Youth and Sports (MEYS) Method of publishing Open access Institutional support FZU-D - RVO:68378271 UT WOS 000686660000001 EID SCOPUS 85112527460 DOI 10.1140/epjd/s10053-021-00235-z Annotation We report on the Boltzmann kinetic equation approach adapted for simulations of warm dense matter created by irradiation of bulk gold with intense ultrashort X-ray pulses. X-rays can excite inner-shell electrons, which triggers creation of deep-lying core holes. Their relaxation, especially in heavier elements such as gold (Z=79) takes complicated pathways, involving collisional processes, and leading through a large number of active configurations. This number can be so high that solving a set of evolution equations for each configuration becomes computationally inefficient, and another modeling approach should be used instead. Here, we use the earlier introduced ’predominant excitation and relaxation path’ approach. We compare the predictions with the available data from high-energy-density experiments. Their good agreement indicates ability of the Boltzmann kinetic equation approach to describe warm dense matter created from high-Z materials after their irradiation with X rays.
Workplace Institute of Physics Contact Kristina Potocká, potocka@fzu.cz, Tel.: 220 318 579 Year of Publishing 2022 Electronic address http://hdl.handle.net/11104/0322022
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