Chapter

Large Finite Systems

Volume 20 of the series The Jerusalem Symposia on Quantum Chemistry and Biochemistry pp 289-301

Isolated, Bare Metal Clusters: Abundances And Ionization

  • Ernst SchumacherAffiliated withInstitute for Inorganic, Analytic, and Physical Chemistry, University of Berne
  • , Manfred KappesAffiliated withInstitute for Inorganic, Analytic, and Physical Chemistry, University of Berne

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Abstract

Metal cluster ensembles serve as ingredients for modelling disordered (glassy, liquid) metals. They are also the first manifestations of bonding interactions of metal atoms. Seme of their properties make them new chemical entities which merit research in their own right. Clusters can now be made and studied for all metals as size distributions. There is no agreement yet, what constitutes a reproducibly “correct” size-abundance distribution, nor do we know how to port results from one cluster source to the next. All inferences drawn from dominant species in a mass spectrum must, therefore, be scrutinized for a number of influences before one can draw conclusions about intrinsic properties. This is exemplified with abundances and phototoinization potentials of alkali cluster beams. The scope and experimental applicability of global and detailed theoretical descriptions is discussed and problems to be solved are enumerated.