Hannover 2013 – wissenschaftliches Programm
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A: Fachverband Atomphysik
A 7: Interaction with VUV and X-ray light I
A 7.5: Vortrag
Montag, 18. März 2013, 15:00–15:15, B 302
XUV induced dissociative photo-ionization of H2 observed by electron-ion correlation — •Andreas Fischer1, Alexander Sperl1, Philipp Cörlin1, Michael Schönwald1, Arne Senftleben1, Joachim Ullrich1,2, and Robert Moshammer1 — 1Max-Planck-Institut für Kernphysik, Heidelberg — 2Physikalisch-Technische Bundesanstalt, Braunschweig
We studied the dissociative photo-ionization of H2 induced by XUV radiation. The use of a reaction microscope enables us to perform kinematically complete coincidence measurements. In an ion–electron-correlation measurement we observed an asymmetric dissociation in the molecular frame, similar to the asymmetry observed by [1], caused by path interference of two different dissociation channels. The first channel includes the H2+(A 2Σu) state and the second the H2+(X 2Σg) state and the doubly excited H2(Q1 1Σu) states. A semi-classical simulation, using phase integrals, reproduces the observed asymmetry.
[1] F. Martín, J. Fernández, T. Havermeier, L. Foucar, T. Weber, K. Kreidi, M. Schöffler, L. Schmidt, T. Jahnke, O. Jagutzki, et al., Science 315, 629 (2007)