Stuttgart 2012 – wissenschaftliches Programm

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A: Fachverband Atomphysik

A 27: Poster: Photoionization

A 27.6: Poster

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

Dynamic chirality in the weakly-bound Ar tetramer studied by Coulomb explosion imaging — •Maksim Kunitski, Markus Schöffler, Jian Wu, Martin Pitzer, Till Jahnke, Lothar Ph. H. Schmidt, and Reinhard Dörner — Institut für Kernphysik, Goethe-Universität Frankfurt am Main, Max-von-Laue-Str. 1, 60438 Frankfurt am Main, Germany

Chirality related phenomena such as parity violation, circular dichroism, homochirality [1,2] have attracted much attention in the recent time. Besides "normal" or "static" chirality one distinguishes also instantaneous or "dynamic" chirality, which, for instance, can be induced by zero point vibrations in systems that are in average achiral and symmetric [3].

In this contribution we are going to present our recent results on the investigation of dynamic chirality in the weakly-bound Ar tetramer. Namely, we successfully applied Coulomb explosion imaging by means of the COLd Target Recoil Ion Momentum Spectroscopy (COLTRIMS) [4] for determination of two instantaneous enantiomeric structures of Ar tetramer. Experiments with left- and right-handed circularly polarized femtosecond laser fields reveal no circular dichroism in quadruple ionization of these two enantiomeric forms.

[1] M. Quack, Faraday Discuss. 150, p. 533 (2011)

[2] L. D. Barron, Space Sci. Rev. 135, p.187 (2008)

[3] T. Kitamura et al., J. Chem. Phys. 115, p.5 (2001)

[4] R. Dörner et al., Phys. Rep. 330, p. 95 (2000)