Dresden 2011 – wissenschaftliches Programm

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A: Fachverband Atomphysik

A 26: Poster III

A 26.20: Poster

Donnerstag, 17. März 2011, 16:00–18:30, P2

Velocity Map Imaging of angular distributions of atomic photoelectrons produced in the XUV regime — •Torsten Hartmann1, Tobias Vockerodt1,2, Daniel Steingrube1,2, Emilia Schulz1,2, Uwe Morgner1,2, and Milutin Kovačev1,21Institut für Quantenoptik, Leibniz Universität Hannover — 2QUEST, Centre for Quantum Engineering and Space-Time Research

Angular distribution of atomic photoelectrons (PAD) is well understood concerning single-photon ionization and above threshold ionization. However, for the ionisation of an atom using two or three photon processes, theory predicts differing PADs. [1]

We present an experimental setup for the investigation of PADs which are dominated by the initial state of the atom and by rescattering effects with the parent ions only. This is done by using a high pulse energy laser source centered at a wavelength of 265 nm. With the help of a velocity map imaging spectrometer we expect to detect highly structured PADs from few-photon ionized Helium atoms and therefore validate the theoretical predictions.

[1] S. Bauch, M. Bonitz, "Angular distributions of atomic photoelectrons produced in the uv and xuv regime", PRA 78, 043403, 2008

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