Dresden 2011 – wissenschaftliches Programm
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A: Fachverband Atomphysik
A 26: Poster III
A 26.33: Poster
Donnerstag, 17. März 2011, 16:00–18:30, P2
Comparison of mixed quantum-classical and full quantum results for the multiphoton dissociation of H2+ — •Michael Fischer1, Frank Grossmann1, Rüdiger Schmidt1, Jan Handt2, Sebastian Krause2, and Jan-Michael Rost2 — 1Institut fuer Theoretische Physik, Technische Universitaet Dresden,D-01062 Dresden, Germany — 2Max Planck Institute for the Physics of Complex Systems, Noethnitzer Strasse 38, D-01187 Dresden, Germany
We present a mixed quantum-classical approach for the time-dependent dynamics of para-H2+ exposed to short intense laser pulses with 800 nm wavelength including all nuclear as well as electronic degrees of freedom. Depending on the initial vibrational state, the angular distributions of photo fragments show characteristic shapes in very good agreement with our full quantum calculations. The results are interpreted in the framework of two-dimensional adiabatic Floquet surfaces which depend on the internuclear separation and the rotation angle, demonstrating that adiabatic light-dressed surfaces are a useful concept also for full dimensional nuclear dynamics. With the help of kinetic energy release spectra, we are able to extract the contribution of different photon channels also in the quantum-classical case.