Evolution of Magic Numbers in Mass Spectra of Clusters after Ionization
Abstract
Clusters of various materials have been generated by adiabatic expansion, ionized by electron impact and analysed by a time-of-flight mass spectrometer. The size distribution of the ions is determined either at the end of the acceleration gap (a few microseconds after ionization) or at the entrance to the detector (a factor of ten later). These experiments demonstrate that the well-known intensity anomalies of water clusters evolve very slowly via evaporation of monomers from the cluster ions. In the cases of CO2 and 2,2-dimethylpropane (C5H12) similar processes are observed. It seems that the corresponding timescale for the evolution of “ magic numbers” in xenon cluster ions is much shorter.
Department
Physics
Publication Date
6-3-1985
Journal Title
Surface Science
Publisher
Elsevier
Digital Object Identifier (DOI)
Document Type
Article
Recommended Citation
D. Kreisle, O. Echt, M. Knapp and E. Recknagel, Evolution of Magic Numbers in Mass Spectra of Clusters after Ionization, Surf. Sci. 156 (1985) 321