Relativistic and resonant effects on x-ray multiphoton multiple ionization of heavy atoms

Sang-Kil Son, Koudai Toyota, Robin Santra, Benedikt Rudek, Artem Rudenko, and Daniel Rolles

[BibTeX][slide: 5Mb]https://www.dpg-verhandlungen.de/year/2019/conference/rostock/part/a/session/28/contribution/7?lang=en

An accurate description of the interaction of intense hard x-ray pulses with heavy atoms, which is crucial for many applications of x-ray free- electron lasers (XFELs), represents a hitherto unresolved challenge for theory because of the enormous number of electronic configurations and relativistic effects to be taken into account. Here we present a joint experimental and theoretical study of xenon atoms irradiated by unprecedentedly high-intensity hard x-rays up to 2×10¹⁹ W/cm². Our results show the interplay of relativistic and resonant effects on x-ray multiphoton multiple ionization of heavy atoms and demonstrate the predictive power of the theoretical model, which provides a basis for accurate modeling of radiation damage in XFEL experiments.

Tags: Xe, relativity, resonance, excitation, damage, heavy atom, x-ray, REXMI, LCLS, experiment, XATOM, XFEL, CFEL, DESY

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