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A: Fachverband Atomphysik

A 21: Poster: Photoionization

A 21.4: Poster

Tuesday, March 19, 2013, 16:00–18:30, Empore Lichthof

The influence of electron-electron interaction on localization effects in microwave-driven helium — •Felix Jörder, Markus Heinrich, Klaus Zimmermann, Alberto Rodrigues, and Andreas Buchleitner — Physikalisches Institut, Uni Freiburg, Deutschland

The driven helium atom defines a paradigmatic scenario of a fragmenting quantum system, characterized by high spectral densities and decay channels into multiple continua. The microwave-induced excitation process of helium Rydberg atoms is retarded by dynamical localization effects, leading to strongly reduced multiphoton decay rates. We present numerical simulations of this process within a collinear model, tuning the impact of the interelectronic repulsion by varying the initial energies of both electrons and the spatial configuration of electrons and nucleus.