Hannover 2016 – wissenschaftliches Programm
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A: Fachverband Atomphysik
A 11: Atomic clusters I (with MO)
A 11.1: Vortrag
Montag, 29. Februar 2016, 17:00–17:15, f107
Time-resolved luminescence detection from noble gas clusters after photon excitation — •Andreas Hans1, Philipp Schmidt1, Florian Wiegandt2, Christian Ozga1, Xaver Holzapfel1, Till Jahnke2, Martin Pitzer1, Uwe Hergenhahn3, Reinhard Dörner2, Arno Ehresmann1, and André Knie1 — 1Institut für Physik, Universität Kassel, Heinrich-Plett-Straße 40, 34132 Kassel — 2Institut für Kernphysik, J.W. Goethe Universität, Max-von-Laue-Straße 1, 60438 Frankfurt — 3Leibniz-Institut für Oberflächenmodifizierung e.V., Permoserstraße 15, 04318 Leipzig
Fluorescence spectrometry is a powerful technique to investigate the electronic structure and decay mechanisms of atomic clusters. In these clusters the lifetimes of excited states can deviate significantly from those in the atomic case. It was shown that time-resolved detection enables an efficient discrimination of cluster and monomer signal [1]. This way features can be seperated, even if they overlap in excitation energy or emission wavelength. The lifetimes of excited states can give further information about the nature of the emission mechanism, e.g. emission from excitonic states, from evaporated atoms, or due to radiative charge transfer. We illustrate the experimental technique of time-resolved fluorescence spectrometry upon excitation by synchrotron radiation and present results from experiment on neon and argon clusters.
[1] A. Knie, A. Hans, et al., New J. Phys. 16, 102002 (2014)