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A: Atomphysik

A 14: Atomare Systeme in externen Feldern II

A 14.4: Vortrag

Mittwoch, 15. März 2006, 17:15–17:30, H6

Doubly excited helium in combined static and alternating electric fields — •Artem Dudarev¹, Alexej Schelle¹, Javier Madronero^1,2, Dominique Delande³, and Andreas Buchleitner ¹ — ¹Max-Planck-Institut für Physik komplexer Systeme, Dresden — ²Physik Department, Technische Universität München, München — ³Laboratoire Kastler Brossel, Paris

We consider planar helium driven by an electromagnetic field. Non-dispersive two-electron wave packets propagating along classical periodic orbits were previously identified in the Floquet spectrum. It was shown that the autoionization rates of such wave packets, in a two dimensional configuration space, are orders of magnitude larger than in a configuration space restricted to one spatial coordinate. Here we study how a transverse confinement of the electronic motion by an additional static electric field affects the wave packets’ lifetimes.