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BibTeX file of [Son19e] [show it without abstract] @conference{Son19e, author={Sang-Kil Son}, title={What happens to atoms and molecules during x-ray free-electron laser pulses?}, year={2019}, month={July 16}, booktitle={Physics Seminar}, organization={Department of Physics}, school={UNIST}, address={Ulsan, Korea}, keywords={XATOM; XMOLECULE; MMID; REXMI; CREXIM; Xe; CH3I; XFEL; CFEL; DESY;}, note={invited talk}, abstract={X-ray free-electron lasers (XFELs) have brought an impact on various scientific fields, including AMO physics, material science, astrophysics, and molecular biology. Understanding how matter interacts with ultraintense x-ray pulses generated by XFELs is fundamental and crucial for most XFEL applications. In this talk, I will mainly discuss how to describe ionization and fragmentation dynamics of atoms and molecules when they are exposed to intense XFEL pulses. Because of the extremely high x-ray photon fluence within very short pulse duration, materials interacting with XFEL undergo significant radiation damage, i.e., they possibly become highly ionized and then explode. I will present a theoretical framework to treat x-ray-induced processes and to simulate radiation damage dynamics, introducing two dedicated toolkits, XATOM and XMOLECULE. Then I will present two recent studies, x-ray multiphoton ionization dynamics of Xe atoms and ultrafast explosion dynamics of iodine-containing polyatomic molecules. The former demonstrates an interplay between resonance and relativistic effects in the heavy-atom ionization dynamics, and the latter reveals x-ray molecular ionization enhancement via intramolecular charge transfer. Both of them provide critical insights of radiation damage dynamics of molecules containing heavy atoms at high x-ray intensity. With these examples, I will demonstrate how theory and experiment work together to advance XFEL science, and discuss how to apply these new findings for potential XFEL applications such as femtosecond x-ray nanocrystallography.} } Sang-Kil Son, What happens to atoms and molecules during x-ray free-electron laser pulses? in Physics Seminar (Department of Physics, UNIST, Ulsan, Korea, July 16, 2019) [invited talk] ![[slide]](/biblio/img/slide.gif) [slide: 10Mb]![[abstract]](/biblio/img/abstract.gif) [abstract]
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