Observation of multiply charged silver-cluster anions
Institut für Physik, Johannes Gutenberg-Universität Mainz, Germany
Corresponding author: a email@example.com
Published online: 15 September 2001
Singly charged silver-cluster anions are produced in a laser vaporization source and transferred into a Penning trap. After size selection the clusters are subjected to an electron bath in the trap, which results in the attachment of further electrons. The relative abundance of dianions or trianions as a function of the clusters' size is analyzed by time-of-flight mass spectrometry. Silver-cluster dianions are observed for sizes and trianions for n> 100. In addition, a detailed study of the cluster sizes shows a pronounced resistance to electron attachment for singly charged anions Ag with a closed electronic shell, in particular Ag, Ag, and Ag. Both the threshold size for the observation of dianionic silver clusters and the shell effects in the production yield correlate favorably with previous theoretical investigations of the respective electron affinities.
PACS: 36.40.Wa – Charged clusters / 36.40.Qv – Stability and fragmentation of clusters / 36.40.Cg – Electronic and magnetic properties of clusters
© EDP Sciences, Società Italiana di Fisica, Springer-Verlag, 2001