Rostock 2019 – wissenschaftliches Programm

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A: Fachverband Atomphysik

A 28: Interaction with VUV and X-ray light

A 28.7: Vortrag

Donnerstag, 14. März 2019, 12:00–12:15, S HS 3 Physik

Relativistic and resonant effects on x-ray multiphoton multiple ionization of heavy atoms — •Sang-Kil Son¹, Koudai Toyota¹, Robin Santra^1,2, Benedikt Rudek³, Artem Rudenko⁴, and Daniel Rolles^4,5 — ¹Center for Free-Electron Laser Science, DESY, Hamburg — ²Department of Physics, Universität Hamburg, Hamburg — ³Physikalisch-Technische Bundesanstalt, Braunschweig — ⁴J. R. Macdonald Laboratory, Department of Physics, Kansas State University, Manhattan, KS, USA — ⁵Deutsches Elektronen-Synchrotron (DESY), Hamburg

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.