Abstract

The potential-energy surfaces of clusters composed of identical charged particles confined by an isotropic harmonic potential are investigated with particular reference to rearrangement mechanisms. A number of intrashell and intershell rearrangements in systems with 4-60 ions are characterized. The intrashell processes, in which only the ions of one roughly concentric shell are permuted, generally exhibit much lower barriers than the intershell processes that involve the migration of an ion between shells. The former rearrangements may generally be described as concerted multiple diamond-square-diamond processes

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