Fragmentation phase transitions in atomic clusters III: Coulomb explosion of metal clusters

O. Schapiro, P. J. Kuntz, K. Möhring, P. A. Hervieux, D. H E Gross, Mohamed Madjet

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19 Citations (Scopus)

Abstract

We discuss the role and the treatment of polarization effects in many-body systems of charged conducting clusters and apply this to the statistical fragmentation of Na-clusters. We see a first order microcanonical phase transition in the fragmentation of Na70 Z+ for Z = 0 to 8. We can distinguish two fragmentation phases, namely evaporation of large particles from a large residue and a complete decay into small fragments only. Charging the cluster shifts the transition to lower excitation energies and forces the transition to disappear for charges higher than Z = 8. At very high charges the fragmentation phase transition no longer occurs because the cluster Coulomb-explodes into small fragments even at excitation energy ε* = 0.

Original languageEnglish
Pages (from-to)219-227
Number of pages9
JournalZeitschrift fur Physik D-Atoms Molecules and Clusters
Volume41
Issue number3
Publication statusPublished - 1 Aug 1997
Externally publishedYes

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ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics

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