One+and+two-electron+atomic+systems+in+strong+fields

One and two-electron atomic systems in strong IR and/or XUV fields

Anatoli Kheifets Research School of Physical Sciences Australian National University Canberra ACT 0200. Australia

We consider time-evolution of atoms with one and two active electrons in a strong pulse of IR and/or XUV fields. We use either a direct time propagation on a numerical grid or seek basis-based solution of the time-dependent Schroedinger equation. The final field-free state is propagated to the detector to find energy and momentum distribution of the photoionized electrons. Examples include multi-photon single-electron ionization of H and Li atoms as well as two-color IR and XUV double ionization of He.