Berlin 2014 – wissenschaftliches Programm
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A: Fachverband Atomphysik
A 30: Interaction with VUV and X-ray light I
A 30.5: Vortrag
Mittwoch, 19. März 2014, 15:15–15:30, BEBEL E42
Tracing Charge Transfer in Dissociating Multiply Charged Iodine Molecules by XUV Pump-Probe Experiments — •Kirsten Schnorr1, Arne Senftleben1, Moritz Kurka1, Georg Schmid1, Thomas Pfeifer1, Artem Rudenko2, Kristina Meyer1, Matthias Kübel3, Matthias Kling3, Björn Siemer4, Michael Wöstmann4, Stefan Düsterer5, Joachim Ullrich6, Claus-Dieter Schröter1, and Robert Moshammer1 — 1Max-Planck-Institut für Kernphysik, Heidelberg — 2J.R. Macdonald Laboratory, Kansas State University — 3Max-Planck-Institut für Quantenoptik, Garching — 4Westfälische Wilhelms-Universität, Münster — 5Deutsches Elektronen-Synchrotron, Hamburg — 6Physikalisch-Technische Bundesanstalt, Braunschweig
The dynamics of dissociating multiply charged iodine molecules, I2n+, is induced and probed by intense XUV pulses delivered by the free-electron laser in Hamburg (FLASH). A first pulse multiply ionizes I2 and thereby triggers the fragmentation of the molecule. During the dissociation a probe pulse further ionizes the fragments after an adjustable time-delay. Depending on their internuclear distance the probe pulse may also initiate charge transfer between the ions. In this way we determine the critical separation and time scales up to which charge transfer along the internuclear axis takes place. These scales are particularly important for understanding the radiation damage occurring in X-ray single-molecule imaging.