Hannover 2013 – wissenschaftliches Programm
Bereiche | Tage | Auswahl | Suche | Aktualisierungen | Downloads | Hilfe
A: Fachverband Atomphysik
A 30: Poster: Interaction with VUV and X-ray light
A 30.8: Poster
Mittwoch, 20. März 2013, 16:00–18:30, Empore Lichthof
XUV/IR pump-probe and single XUV photon dissociative ionization of H2 — •Alexander Sperl1, Andreas Fischer1, Philipp Cörlin1, Michael Schönwald1, Arne Senftleben1, Joachim Ullrich1,2, and Robert Moshammer1 — 1Max-Planck-Institut für Kernphysik, Heidelberg — 2Physikalisch-Technische Bundesanstalt, Braunschweig
Using a pump-probe scheme of an XUV-pump and IR-probe pulse, we investigated the nuclear wave packet dynamics of the high vibrational states in the H2+(X 2Σg) potential. We observed the beating of the nuclear wave-packet as well as the de-phasing and re-phasing of the wave packet caused by the anharmonicity of the potential. By Fourier-transforming the time signal, we obtained the frequency spacings of the different vibrational states. We further studied the dissociative ionization induced by a single XUV photon. Here the doubly excited states Q1 were mainly under investigation. In an ion-electron-correlation measurement we observed an oscillatory molecular frame asymmetry in the dissociation, similar to [1]. The asymmetry is caused by the interference of two paths.
Both measurements were performed using a reaction microscope, enabling the kinematically complete reconstruction of all momenta in a reaction.
[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)