Electron localization involving doubly excited states in broadband extreme ultraviolet ionization of H2
Andreas Fischer, Alexander Sperl, Philipp Cörlin, Michael Schönwald, Helga Rietz, Alicia Palacios, Alberto González-Castrillo, Fernando Martín, Thomas Pfeifer, Joachim Ullrich, Arne Senftleben, and Robert Moshammer
Accepted
Dissociative single ionization of $\text{H}_2$ induced by XUV photons from an attosecond pulse train has been studied in a kinematically complete experiment. Depending on the electron kinetic energy and the alignment of the molecule with respect to the laser polarization axis we observe pronounced asymmetries in the relative emission directions of the photo-electron and the $\text{H}^+$ ion. The energy-dependent asymmetry pattern is explained by a semi-classical model and further validated by fully quantum mechanical calculations, both in very good agreement with the experiment.