title: Structure of spherical three-dimensional Coulomb crystals.
abstract: An analysis of the structural properties of three-dimensional Coulomb clusters confined in a spherical parabolic trap is presented. Based on extensive high-accuracy computer simulations the shell configurations and energies for particle numbers in the range 60 < or = N < or = 160 are reported. Further, the intrashell symmetry and the lowest metastable configurations are analyzed for small clusters and a different type of excited state that does not involve a change of shell configuration is identified.
authors.affiliation: Institut für Theoretische Physik und Astrophysik, Christian-Albrechts-Universität zu Kiel, Leibnizstrasse 15, 24098 Kiel, Germany.
authors.forename: P
authors.initials: P
authors.lastname: Ludwig
authors.forename: S
authors.initials: S
authors.lastname: Kosse
authors.forename: M
authors.initials: M
authors.lastname: Bonitz