Critical (appearance) sizes of multiply charged hot (liquid) alkali metal clusters are calculated by equating the rates for neutral monomer and light charged-particle emission. The rate formulas are based on the Weisskopf model with level densities (with appropriate surface corrections) and Coulomb barriers determined from the measured temperature dependence of the specific heat and the Wigner-Seitz radius of the bulk. The time development of temperature and size of large clusters are also calculated by solving rate equations for multiple emission of cluster atoms.
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Fröbrich, P. Theoretical description of the decay of hot charged alkali metal clusters. Z Phys D - Atoms, Molecules and Clusters 40, 198–201 (1997). https://doi.org/10.1007/s004600050193