Hamburg 2009 – scientific programme

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A: Fachverband Atomphysik

A 34: Poster II

A 34.38: Poster

Thursday, March 5, 2009, 16:30–19:00, VMP 9 Poster

Strong field ionization, rescattering and resonances in the extreme ultraviolet domain — •Hossein Ebadi, Karen Hatsagortsyan, and Christoph H. Keitel — Max-Planck-Institut für Kernphysik, Saupfercheckweg 1, 69117 Heidelberg

Stimulated by the advances in the XFEL (FLASH) radiation sources, the strong field ionization dynamics is investigated in the short-wavelength (UV, XUV) domain. The investigation is based on numerical solutions of the time-dependent Schrödinger equation (the nonrelativistic treatment is valid in this frequency domain). The main focus is the over-the-barrier ionization regimes at high frequencies and the transition region to the stabilization regime. The strong field ionization dynamics is found to be substantially different in the XUV domain compared with what is known for the infrared regime. In particular, the atomic structure signatures (resonances) survive up to the over-the-barrier regime, the rescattering is modified and interference structures arise in the low-energy photo-electron spectrum.