Stuttgart 2012 – wissenschaftliches Programm

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A: Fachverband Atomphysik

A 26: Poster: Atomic systems in external fields

A 26.8: Poster

Mittwoch, 14. März 2012, 16:30–19:00, Poster.V

Numerical simulations of the pump-probe ionization of Lithium — •David Hochstuhl and Michael Bonitz — Universität Kiel

In this contribution we study the IR-XUV pump-probe ionization of Lithium. The basic scenario is [1]: (i) the XUV photon ionizes an 1s electron. (ii) the 2s electron becomes excited through a shake-up process. (iii) depending on the frequency and intensity of the IR field, the 2s electron is excited above the threshold and gets ionized by the IR field. In existing models, this process is described using certain approximations to the XUV ionization step (like the strong field approximation), as well as to the subsequent inner-electronic processes (like a sudden switching to the ion). To overcome these limitations, we directly solve the time-dependent Schrödinger equation in a restricted, problem-adapted subspace of the three-particle Hilbert space.

[1] A.K. Kazansky, N.M. Kabachnik, J. Phys. B 41 135601