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BibTeX file of [Son18] [show it without abstract]

@conference{Son18,
    author={Sang-Kil Son},
    title={Ultrafast ionization and fragmentation dynamics of molecules at high x-ray intensity},
    year={2018},
    month={January 6-8},
    booktitle={The 7th Topical Conference of the Indian Society of Atomic and Molecular Physics},
    organization={Indian Society of Atomic and Molecular Physics},
    address={Tirupati, India},
    keywords={XMOLECULE; x-ray multiphoton ionization; x-ray explosion dynamics; Xe; CH3I; XFEL; LCLS; CFEL; DESY;},
    note={invited talk},
    url={http://www.iisertirupati.ac.in/isamp-tc7/},
    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 intense x-ray pulses is essential for most XFEL applications. Exposed to an intense x-ray pulse, an atom within a molecule absorbs many photons sequentially and ejects many electrons, turning into a highly charged ion within a femtosecond time scale. This multiphoton multiple ionization dynamics differs from that at a third-generation x-ray synchrotron radiation source, where one-photon absorption is dominant, and from multiphoton strong-field ionization, where many photons are simultaneously absorbed to ionize a single electron. The created charges are redistributed within the molecule, and then it explodes due to Coulomb repulsion. This fragmentation dynamics occurs along with ionization dynamics.
    
    In this talk, I will present a theoretical framework to treat x-ray-induced processes and to simulate detailed ionization and fragmentation dynamics of atoms and molecules, introducing two dedicated x-ray physics toolkits, XATOM [1-4] and XMOLECULE [5-7]. With a joint experimental and theoretical study of small polyatomic molecules irradiated by XFEL pulses, I will demonstrate how the theoretical model describes the essential mechanisms underlying explosion dynamics of molecules in intense x-ray pulses. One of the key findings is that ionization of heavy-atom-containing molecules at high x-ray intensity is substantially enhanced in comparison with that of isolated atoms. This is called charge-rearrangement-enhanced x-ray ionization of molecules (CREXIM) [7] as illustrated in Figure 1. The CREXIM effect plays an important part in the quantitative understanding of XFEL--molecule interactions and will need to be taken into account for future XFEL applications.} }

Sang-Kil Son, Ultrafast ionization and fragmentation dynamics of molecules at high x-ray intensity in The 7th Topical Conference of the Indian Society of Atomic and Molecular Physics (Indian Society of Atomic and Molecular Physics, Tirupati, India, January 6-8, 2018) [invited talk] [pdf][pdf][slide][slide: 8Mb][abstract][abstract][link][link]


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