Dresden 2011 – wissenschaftliches Programm

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A: Fachverband Atomphysik

A 26: Poster III

A 26.21: Poster

Donnerstag, 17. März 2011, 16:00–18:30, P2

Fluorescence of a nanoplasma in clustersMaria Müller1, Marcus Adolph1, •Daniela Rupp1, Tais Gorkhover1, Maria Krikunova1, Yevheniy Ovcharenko1, Lasse Schrödter2, Tim Laarmann2, and Thomas Möller11TU-Berlin, Institut für Optik und atomare Physik, Deutschland — 2HASYLAB/DESY, Hamburg, Deutschland

The intense short wavelength radiation provided by free-electron-lasers (FEL) opened up many new fields of research in the last five years. FEL in Hamburg (FLASH) produces soft X-ray pulses with pulse durations of several ten femtoseconds and peak intensities up 10** photons/cm* achieved when focused on a small spot. One domain of interest is the interaction of these intensive XUV femtosecond light pulses with matter, in particular nanosized clusters which form the link between the atomic- and molecule physics on the one hand and solid state physics on the other.

Our investigation concentrates on the development of the electronic and optical properties as well as on the dissociation dynamics of clusters, irradiated by the XUV pulse.

In this poster we intend to present studies of fluorescence of pure and core-shell clusters with dependence on size. In comparison to synchrotron radiation the intensity by the FLASH is much higher and for this reason allows different excitation processes which lead to a nanoplasma in the core of clusters. Fluorescence spectroscopy is a promising approach to study the recombination processes that are taking place in the created nanoplasma.

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