Hannover 2016 – wissenschaftliches Programm

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A: Fachverband Atomphysik

A 21: Interaction with strong or short laser pulses

A 21.8: Poster

Dienstag, 1. März 2016, 16:30–19:00, Empore Lichthof

Spatial electron correlation and ionization of helium in strong, ultrashort laser pulses — •Gergana Borisova, Andreas Fischer, Veit Stooß, Alexander Blättermann, Thomas Ding, Andreas Kaldun, and Thomas Pfeifer — Max-Planck-Institut für Kernphysik, Heidelberg

Motivated by a transient-absorption spectroscopy experiment, where a difference in the ionization of singly and doubly excited states with similar ionization energy was observed, the electron-electron correlation dynamics was investigated.

Here, we show results from the investigation of the electron dynamics in the helium atom interacting with strong laser fields on an attosecond time scale. We analyzed the electron-electron correlation dynamics responsible for the enhancement of the ionization in doubly excited helium by means of the time-dependent population of these states during and right after the laser pulse.

For this we employ a numerical quantum-mechanical model based on solving the one-dimensional time-dependent Schrödinger equation for two electrons.