ON THE FISSION OF CHARGED ALKALI-METAL CLUSTERS

A. Rigo, F. Garcias, J.A. Alonso, J.M. López, M. Barranco, A. Mañanes and J. Németh
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A. Rigo: Departament de Física, Universitat de les Illes Balears, E-07071 Palma de Mallorca, Spain
F. Garcias: Departament de Física, Universitat de les Illes Balears, E-07071 Palma de Mallorca, Spain
J.A. Alonso: Departamento de Física Teórica, Universidad de Valladolid, E-47011 Valladolid, Spain
J.M. López: Departamento de Física Teórica, Universidad de Valladolid, E-47011 Valladolid, Spain
M. Barranco: Departament ECM, Facultat de Física, Diagonal 647, E-08028 Barcelona, Spain
A. Mañanes: Departamento de Física Moderna, Universidad de Cantabria, E-39005 Santander, Spain
J. Németh: Institute of Theoretical Physics, Eötvös University, H-1088 Budapest, Hungary

Surface Review and Letters (SRL), 1996, vol. 03, issue 01, 617-621

Abstract: A deformed jellium model is used to calculate the fission barrier height of${\rm{Na}}_{24}^{2+}\to {\rm{Na}}_{21}^+ + {\rm{Na}}_3^+$within the Kohn-Sham density-functional theory (i.e., including shell effects). Although the shape of the barrier obviously depends on the parametrization of the fission path, we have found that the saddle point corresponds to a configuration in which the emerging fragments are already formed and rather well apart. From this result, we offer a simple way to calculate the barrier height for charged trimer emission from alkali-metal clusters of (almost) arbitrarily large size and charge state.

Date: 1996
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DOI: 10.1142/S0218625X9600111X

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