Hannover 2013 – wissenschaftliches Programm
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A: Fachverband Atomphysik
A 30: Poster: Interaction with VUV and X-ray light
A 30.10: Poster
Mittwoch, 20. März 2013, 16:00–18:30, Empore Lichthof
Dynamics of heteronuclear clusters in strong X-ray pulses — •Pierfrancesco Di Cintio, Ulf Saalmann, and Jan-Michael Rost — Max Planck Institute for the Physics of Complex Systems, Nöthnitzer Straße 38, 01187 Dresden, Germany
We study the fragmentation dynamics of various molecular clusters (like CH4, NH3, H2O) following multiple ionization with short and intense X-ray pulses. Whereas the photons are preferentially absorbed by the core electrons of the heavy species in the cluster, fast intra-molecular charge transfer results in the formation of bare protons. We observe low final charge states of the heavy atoms and an intensity-dependent segregation of the proton and heavy-atom component leading to an inhibited expansion of the latter. Such findings could be relevant to approach the damage processes of large organic molecules as they occur during coherent diffractive imaging with intense X-ray pulses.