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A: Atomphysik

A 20: Poster II: Atomare Systeme in starken Laserpulsen und statischen Feldern

A 20.14: Poster

Donnerstag, 16. März 2006, 16:30–18:30, Labsaal

Probing the cluster dynamics with atto-second VUV and XUV laser pulses — •Ionuţ Georgescu, Ulf Saalmann, and Jan-Michael Rost — Max-Planck-Institut für Physik komplexer Systeme, Nöthnitzer Str. 38, 01187 Dresden, Germany

First experiments [1] with soft X-Ray (VUV range) radiation coming from a free-electron laser were conducted in Hamburg on Xe clusters. They showed an unexpectedly large energy absorption resulting into fast, highly charged ions.

Although several theoretical models [2-5] manage to explain the large energy absorption and the ionic spectra observed after the explosion, the mechanisms which they propose lead to different charge states of the atoms during the interaction with the laser pulse. We investigate how atto-second probe pulses in the VUV and XUV range can be used for time-resolved studies of the charge states of the atoms, thus, providing more insight into the energy absorption mechanisms.

[1] Wabnitz et.al., Nature 420, 482 (2002)

[2] R. Santra and C.H. Greene, PRL 91, 233401 (2003)

[3] C. Siedschlag and J.M. Rost, PRL 93, 043402 (2004)

[4] Jungreuthmayer et.al., J. Phys. B 38, 3029 (2005)

[5] M. Rusek and A. Orlowski, PRA 71, 043202 (2005)