Bereiche | Tage | Auswahl | Suche | Aktualisierungen | Downloads | Hilfe
A: Fachverband Atomphysik
A 28: Poster: Interaction with VUV and X-ray light II
A 28.10: Poster
Mittwoch, 25. März 2015, 17:00–19:00, C/Foyer
Multiphoton Ionization of Krypton Explored by Electron-Ion Coincidence Studies — •Kirsten Schnorr1, Arne Senftleben1, Moritz Kurka1, Georg Schmid1, Sven Augustin1, Yifan Liu1, Artem Rudenko2, Tatiana Marchenko3, Marc Simon3, Rolf Treusch4, Joachim Ullrich5, Thomas Pfeifer1, Claus-Dieter Schröter1, and Robert Moshammer1 — 1Max-Planck-Institut für Kernphysik, Heidelberg — 2J.R. Macdonald Laboratory, Kansas State University — 3UPMC and CNRS, Paris — 4Deutsches Elektronen-Synchrotron, Hamburg — 5Physikalisch-Technische Bundesanstalt, Braunschweig
Understanding the mechanisms of multiphoton absorption and secondary relaxation processes in the XUV and X-ray regime is a prerequisite for all applications of short-wavelength free-electron lasers (FELs), e.g. for single-molecule imaging. Here, we present an electron-ion coincidence study on multiphoton ionization of krypton at 210 eV performed with a reaction microscope at the FEL facility FLASH. The production mechanisms for all observed charge states are analyzed by evaluating intensity-dependent Krn+ ion spectra and the corresponding electron spectra. Even the highest charge state, Kr11+, is found to be produced by sequential multiphoton ionization, which is in line with theoretical predictions (Rudek et al., Nat. Phot. 6, 858-865 (2012)).