Hannover 2016 – wissenschaftliches Programm

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MS: Fachverband Massenspektrometrie

MS 3: Ion Traps, Ion Storage Rings, Molecules, Clusters, Decays and Reactions

MS 3.3: Vortrag

Montag, 29. Februar 2016, 16:00–16:15, f128

Production and storage of new poly-anionic metal clusters at ClusterTrap — •Markus Wolfram, Paul Fischer, Stephan König, Gerrit Marx, Lutz Schweikhard und Albert Vass — Felix-Hausdorffstraße 6, Institut für Physik, Greifswald, Deutschland

The properties of metal clusters depend on their cluster size n but also on their charge state z. The number of electrons which can be attached to a cluster depends on its size but also on the particular metal. While not many nano-systems have yet been investigated with respect to electron attachment, they may well reveal interesting properties and behavior. The aim of the present investigation is to produce new poly-anionic metal clusters by electron attachment to mono-anionic precursors. The mono-anionic clusters are delivered from a laser-ablation/He-gas condensation source and stored in a Penning Trap * simultaneously with electrons. With this so-called electron-bath technique it is possible to charge the clusters up to higher (negative) charge states. The method is currently applied to further metals, including vanadium, iron, cobalt, zinc, zirconium, niobium, tin, tantalum, titanium and lead. The measurements will provide a basis for future investigations of, e.g., the electron binding energies as a function of charge state. The project is supported by a Collaborative Research Center 652 of the DFG.