  Dissociation and fission of small neutral, singly and doubly charged
strontium clusters are studied by means of ab initio density functional theory
methods and high-resolution time-of-flight mass spectrometry. Magic numbers for
small strontium clusters possessing enhanced stability towards monomer
evaporation and fission are determined. It is shown that ionization of small
strontium clusters results in the alteration of the magic numbers. Thermal
promotion of the Coulombic fission for the Sr_7^{2+} cluster is predicted.
