Experiments on clusters
- 35 Downloads
In this contribution we discuss four different types of experiments that have been conducted at molecular beams of neutral clusters. The size of particularly stable sodium chloride clusters and their corresponding geometrical structure is inferred from intensity anomalies in mass spectra. This information is obtained either for charged or for neutral clusters depending on whether the clusters are ionized by electron impact or by multiphoton absorption. The important role of fragmentation in mass spectrometry of xenon clusters is revealed by multiphoton ionization; dissociative reactions occurring on the time scale of 10−7 s with respect to the ionizing event can be analyzed. The solvation energy of negatively charged carbon dioxide clusters as a function of cluster size is obtained from electron attachment spectra. A resonance in the ion yield close to zero eV electron energy signifies that all clusters except for the monomer feature a positive electron affinity. An analysis of the kinetic energy of fragment ions, originating from delayed dissociation of triply charged carbon dioxide clusters, reveals that the size distribution of their fission fragments is extremely symmetric.
KeywordsXenon Cluster Size Sodium Chloride Molecular Beam Electron Affinity
Unable to display preview. Download preview PDF.
- T.P. Martin,Festkörperprobleme (Advances in Solid State Physics) Vol. 24, Ed. P. Gross (Vieweg, Braunschweig, 1984) p. 1.Google Scholar
- R. Pflaum, Ph.D. Thesis, Universität Konstanz 1986. R. Pflaum, K. Sattler and E. Recknagel, submitted to Chem. Phys. Lett.Google Scholar
- T.D. Märk and P. Scheier, submitted for publication.Google Scholar
- M. Knapp, Ph.D. Thesis, Universität Konstanz, 1986.Google Scholar
- J.V. Coe, J.T. Snodgrass, K.M. McHugh, C.B. Freidhoff and K.H. Bowen, submitted J. Phys. Chem.Google Scholar
- O. Echt, in:Physics and chemistry of Small Clusters, NATO ASI Series, Eds. P. Jena, B.K. Rao and S.N. Khanna, in print.Google Scholar
- T. Leisner, Diploma Thesis, University of Konstanz, 1986.Google Scholar
- P. Scheier and T.D. Märk, submitted for publication.Google Scholar
- D. Kreisle, Ph.D. Thesis, Universität Konstanz, 1986.Google Scholar
- R. Casero, J.J. Sáenz and J.M. Soler, unpublished results.Google Scholar