Düsseldorf 2007 – wissenschaftliches Programm
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A: Fachverband Atomphysik
A 22: Poster II - Atomic clusters
A 22.2: Poster
Donnerstag, 22. März 2007, 16:30–18:30, Poster B
Interaction of Xe clusters in He nanodroplets with a strong laser pulse — •Alexey Mikaberidze, Ulf Saalmann, and Jan-Michael Rost — Max Planck Institute for the Physics of Complex Systems, Dresden, Germany
Dynamics of small Xe clusters ( ∼ 100 atoms) embedded into medium-sized He droplets ( ∼ 1000 atoms) under the action of strong femtosecond (pulse length ∼ 100 fs) laser pulses is studied microscopically by means of classical molecular dynamics. The results are compared with those for pure Xe clusters.
He droplets are found to enhance considerably inner and outer ionization of Xe clusters. Presumably, transfer of hot electrons from He shell to Xe core and subsequent electron-impact ionization of Xe ions enhance inner ionization of Xe.
Our theoretical studies were stimulated by recent experiments on Xe clusters grown in He droplets and exposed to strong femtosecond laser pulses conducted at Rostock University [1]. Surprisingly high ionic charges at rather low laser intensities (I ∼ 1014 W/cm2) were observed in these experiments.
[1] T. Döppner, talk at Atomic Physics 2006, Max Planck Institute for the Physics of Complex Systems, Dresden.