Hannover 2010 – wissenschaftliches Programm

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A: Fachverband Atomphysik

A 15: Attosecond Physics I

A 15.5: Vortrag

Mittwoch, 10. März 2010, 17:30–17:45, F 107

Towards pump-probe spectroscopy at the yoctosecond time scale — •Jörg Evers¹, Andreas Ipp^1,2, and Christoph H. Keitel¹ — ¹Max-Planck-Institut für Kernphysik, Heidelberg, Germany — ²Institut für Theoretische Physik, Technische Universität Wien, Österreich

For high-precision spectroscopy and structural studies, short light flashes with high photon energy are required. Shorter pulses with higher photon energy would improve the temporal and spatial resolution, or would allow for the investigation of smaller structures, such as for example atomic nuclei. This motivates the search for alternative light sources.

Here, we show that high-energetic photon pulses down to the yoctosecond timescale can be produced in heavy ion collisions [1]. In particular, we focus on light emission from the initial phase of an expanding quark-gluon plasma (QGP). Based on a recent model for the expansion dynamics of the QGP [2], we find that under certain conditions, a double peak structure in the emission envelope can be observed, which could be the first source for pump-probe experiments at the yoctosecond timescale. Finally, we discuss possible detection schemes for short pulses with high photon energy.

[1] A. Ipp, C. H. Keitel, and J. Evers, Phys. Rev. Lett. 103, 152301 (2009)

[2] M. Martinez and M. Strickland, Phys. Rev. Lett. 100, 102301 (2008).