Hannover 2020 – wissenschaftliches Programm

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MO: Fachverband Molekülphysik

MO 1: Clusters I (joint session MO/A)

MO 1.7: Vortrag

Montag, 9. März 2020, 12:45–13:00, f102

Chemical dynamics in Argon clusters induced by intense x-rays — •Zoltan Jurek1,2, Yoshiaki Kumagai3, Hironobu Fukuzawa3,4, Sang-Kil Son1,2, Beata Ziaja1,2,5, Robin Santra1,2,6, and Kiyoshi Ueda3,41Center for Free-Electron Laser Science, Deutsches Elektronen-Synchrotron, Notkestrasse 85, 22607 Hamburg, Germany — 2The Hamburg Centre for Ultrafast Imaging, Luruper Chaussee 149, 22671 Hamburg, Germany — 3Institute of Multidisciplinary Research for Advanced Materials, Tohoku University, Sendai 980-8577, Japan — 4RIKEN SPring-8 Center, Sayo, Hyogo 679-5148, Japan — 5Institute of Nuclear Physics, PAS, Radzikowskiego 152, 31-342, Krakow, Poland — 6Department of Physics, University of Hamburg, Jungiusstrasse 9, 20355 Hamburg, Germany

In this talk, we focus on the dynamics of rare gas clusters exposed to ultrashort X-ray Free Electron Lasers (XFELs) pulses of intermediate x-ray fluence. In this fluence regime the system is only partially ionized. Therefore, chemical properties of the sample may still play an important role in shaping the ionization dynamics beside the emerging Coulomb forces. As a result, complex fragmentation of the cluster can occur. We show signatures of chemical effects in spectroscopy observables, and present our theoretical simulations, unraveling the time evolution of irradiated Ar clusters in detail [1].This study addresses a regime that is a very common scenario at current XFEL experiments.

[1] Y. Kumagai et al, Phys. Rev. Lett. 120, 223201 (2018)

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