Stuttgart 2012 – wissenschaftliches Programm

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A: Fachverband Atomphysik

A 22: Poster: Interaction with strong or short laser pulses

A 22.4: Poster

Dienstag, 13. März 2012, 16:30–19:00, Poster.V

Creation and Observation of Electronic Wave-Packet Motion in Atoms by Strong Field Ionization — •Lutz Fechner, Nicolas Camus, Thomas Pfeifer, Joachim Ullrich, and Robert Moshammer — Max-Planck-Institut für Kernphysik, Heidelberg

Using a pump-probe scheme for sequential double ionization of atoms in strong few-cycle laser pulses we prepare a coherent superposition of electronically excited states in the singly charged ion with the first pulse that is probed by the time-delayed second pulse. The dynamics of the electronic wave-packet, which reflects the inner structure of the particular atom, has a strong influence on both the delay dependent total ionization yield and the momentum distribution of the electrons released in the second step. In comparison to a recent experiment [1], where recoil-ion momentum spectroscopy was used, we present first kinematically complete measurements on Ne and Ar using a Reaction Microscope that allows to measure the three-dimensional momenta of all particles (ions and electrons) in coincidence.

[1] A. Fleischer et al., Phys. Rev. Lett. 107 (2011), 113003