Berlin 2005 – wissenschaftliches Programm
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A: Atomphysik
A 9: Atoms and Ions in Ultra Short and Strong laser Fields II
A 9.6: Fachvortrag
Samstag, 5. März 2005, 11:45–12:00, HU 3094
Reduced ionization due to nearly separable motion in atoms and C60 — •Manfred Lein — Max-Planck-Institut f. Kernphysik, D-69117 Heidelberg
The barrier-suppression intensity of a system is the laser intensity where the tunneling barrier is pushed below the electron binding energy. It is often used as an estimate of the saturation intensity in strong-field ionization. It is demonstrated here that the common definition of the barrier-suppression intensity should be modified in systems with separable or nearly separable electron motion, including important cases such as hydrogen-like atoms and C60 molecules. For C60, this leads to an additional explanation of ionization suppression, which has been attributed to field-induced polarization previously.