Above threshold ionization of two structurally different
systems is presented namely a rare gas such as argon and the more complex C
60 fullerene. We show that the ionization dynamics is
different and is dominated by the presence of high-lying Rydberg
states in Ar and low-lying bound states in C 60. The study is
based on a theoretical (solving the time dependent Schrödinger
equation) and/or experimental (using measurements from a
photoelectron imaging spectrometer) aspect.