Dynamics and thermodynamics of decay in charged clusters

M.A. Miller, D.A. Bonhommeau, C.P. Moerland, S.J. Gray, M.P. Gaigeot

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8 Citations (Scopus)

Abstract

We propose a method for quantifying charge-driven instabilities in clusters, based on equilibrium simulations under confinement at constant external pressure. This approach makes no assumptions about the mode of decay and allows different clusters to be compared on an equal footing. A comprehensive survey of stability in model clusters of 309 Lennard-Jones particles augmented with Coulomb interactions is presented. We proceed to examine dynamic signatures of instability, finding that rate constants for ejection of charged particles increase smoothly as a function of total charge with no sudden changes. For clusters where many particles carry charge, ejection of individual charges competes with a fission process that leads to more symmetric division of the cluster into large fragments. The rate constants for fission depend much more sensitively on total charge than those for ejection of individual particles.

Original languageEnglish
Pages (from-to)2428-2434
Number of pages7
JournalMolecular Physics
Volume113
Issue number17-18
DOIs
Publication statusPublished - 17 Sep 2015

Bibliographical note

Special Issue: Special Issue in Honour of Jean-Pierre Hansen

Keywords

  • charged clusters
  • instability
  • Lennard-Jones
  • Rayleigh limit
  • simulation

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    Miller, M. A., Bonhommeau, D. A., Moerland, C. P., Gray, S. J., & Gaigeot, M. P. (2015). Dynamics and thermodynamics of decay in charged clusters. Molecular Physics, 113(17-18), 2428-2434. https://doi.org/10.1080/00268976.2015.1037805