Berlin 2005 – wissenschaftliches Programm
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A: Atomphysik
A 1: Photoionisation
A 1.7: Fachvortrag
Freitag, 4. März 2005, 12:15–12:30, HU 3075
Signatures of molecular symmetry and alignment in strong-field ionization of molecules — •A. Becker1 and F.H.M. Faisal2 — 1Max-Planck-Institut für Physik komplexer Systeme, Nöthnitzer Strasse 38, D-01187 Dresden — 2Fakultät für Physik, Universität Bielefeld, Postfach 100 131, D-33501 Bielefeld
Multiphoton ionization of molecules is studied using the strong-field S-matrix approach. Numerical calculations for the angular distribution and the energy spectrum of the photoelectron as well as the total ionization rates and yields in an intense linearly polarized laser pulse are performed. Results are obtained for molecules aligned along the polarization axis and for ensembles of molecules having a random orientation of the molecular axis with respect to the polarization direction. Signatures of the molecular geometry and the orbital symmetry are identified. Predictions of the present theory for the dependence of the total ionization rates and yields on the orientation of the molecule are compared with other theoretical models and recent experimental data.