Hannover 2013 – wissenschaftliches Programm

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A: Fachverband Atomphysik

A 38: Poster: Atomic clusters (with MO)

A 38.5: Poster

Donnerstag, 21. März 2013, 16:00–18:30, Empore Lichthof

Temporally controlled two-electron wavepackets — •Zhaohe Liang — Noethnitzer str.38, Dresden,Germany

Temporally controlled two-electron wavepackets

Most research on correlated two-electron motion has been based on single or multiple photon absorption in the energy domain. The availability of ultrashort light pulses offers the opportunity to probe electron dynamics in an atom or molecule on its intrinsic time scale. Then we intend to investigate the dynamics and interactions of two wavepackets from two different electrons, which can be generated in various ways: 1) double ionization (DI) in Helium with a single short XUV pulse such that two photon absorption is necessary but one photon cannot ionize He+. [1] 2) DI in Helium with two attoseconds laser pulses of variable time delay. 3) Ionizing an inner shell electron of an atom with the Auger electron generating a second, time delayed wavepacket. This investigation will aim at characteristic features in the cross-section, angular and energy distributions, associated with each mechanism.

Reference: [1] Nabekawa Y.; Hasegawa H.; Takahashi E. and Midorikawa k. 2005 Phys. Rev. Lett. 94,043001