Abstract
SynopsisFree size-selected metal clusters are investigated by core-level photoelectron spectroscopy at the free electron laser FLASH. The binding character of the clusters, as well as a multitude of relaxation channels are indicated by size- dependent core-level shifts and low-energy secondary electron emission, respectively. A new apparatus including a cryogenic ion-trap is currently built to extend the studies towards the smallest cluster sizes (less than 10 atoms), where low photo-absorption cross sections have to be matched by increased cluster density.
Highlights
With increasing photon energies, and with decreasing cluster size, the photoionization cross sections decrease rapidly, limiting the photo-electron yield
Synopsis Free size-selected metal clusters are investigated by core-level photoelectron spectroscopy at the free electron laser FLASH
The binding character of the clusters, as well as a multitude of relaxation channels are indicated by sizedependent core-level shifts and low-energy secondary electron emission, respectively
Summary
With decreasing cluster size, the photoionization cross sections decrease rapidly, limiting the photo-electron yield. Erschienen in: Journal of Physics: Conference Series ; 635 (2015). XXIX International Conference on Photonic, Electronic, and Atomic Collisions (ICPEAC2015) IOP Publishing
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