title: Surface entropy of rare-gas clusters.
abstract: Abundances of ArN+ and XeN+ clusters produced in a supersonic expansion source are inverted to find relative dissociation energies. The values around the shell and subshell closings at N=55, 71, and 147 differ from theoretical values derived from ground-state energies of Lennard-Jones clusters. A significant part of the difference can be accounted for by the conformational entropies of surface atoms and vacancies.
authors.affiliation: Department of Physics, Gothenburg University, SE-41296 Gothenburg, Sweden.
authors.forename: S
authors.initials: S
authors.lastname: Prasalovich
authors.forename: K
authors.initials: K
authors.lastname: Hansen
authors.forename: M
authors.initials: M
authors.lastname: Kjellberg
authors.forename: V N
authors.initials: VN
authors.lastname: Popok
authors.forename: E E B
authors.initials: EE
authors.lastname: Campbell