Hannover 2010 – scientific programme

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A: Fachverband Atomphysik

A 8: Poster I

A 8.19: Poster

Tuesday, March 9, 2010, 16:30–19:00, Lichthof

Photoionization of one-dimensional model atoms — •David Hochstuhl, Sebastian Bauch, and Michael Bonitz — ITAP, Christian-Albrechts Universität zu Kiel, 24098 Kiel

Computer simulations using one-dimensional model atoms may often qualitatively reproduce experimental results, and in this way offer a great insight into the processes involved in the ionization in strong laser fields. The movement of the electrons is thereby restricted only to the polarization axis of the electromagnetic field. In particular, the one-dimensional helium atom is employed frequently in the literature, since it is able to describe several correlation effects like the double ionization knee. Simulations on larger systems are, however, only rarely encountered. The focus of this poster lies thus on the usefullness of such models.
We present numerically converged calculations for one-dimensional atoms with four and six electrons, which are obtained by the multiconfigurational time-dependent Hartree-Fock method, and compare them to results from the helium model. Further, we analyze to which extent these models are able to approximate their three-dimensional analogues beryllium resp. carbon.