Erlangen 2018 – wissenschaftliches Programm
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A: Fachverband Atomphysik
A 25: Poster Session I
A 25.14: Poster
Dienstag, 6. März 2018, 16:15–18:15, Redoutensaal
Disentangling the photodissociation pathways of small lead clusters by time-resolved monitoring of their delayed decays: The case of Pb31+ — •Markus Wolfram, Stephan König, Steffi Bandelow, Paul Fischer, Alexander Jankowski, Gerrit Marx, and Lutz Schweikhard — Ernst-Moritz-Arndt Universität, Greifswald, Deutschland
Lead clusters Pbn(+/−) in the size range between about n = 15 and 40 have recently shown to exhibit complex dissociation spectra due to sequential and competing decays [1]. In order to disentangle the pathways, the exemplary Pb31+ clusters have been stored and size selected in a Penning trap at the ClusterTrap setup [2] and irradiated by nanosecond laser pulses.
We present time-resolved measurements of the decay behavior at time scales from several tens of microseconds to several hundreds of milliseconds. The study results in strong evidence that Pb31+ decays not only by neutral monomer evaporation but also by neutral heptamer breaking off [3].
[1] S. König et al., J. Phys. Chem. C 121 (2017) 10858
[2] F. Martinez et al., Int. J. Mass Spectrom. 365-366 (2014) 266
[3] M. Wolfram et al., J. of Phys. B: Atomic, Molecular and Optical Physics, in print