Surface entropy of rare-gas clusters.
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.
Prasalovich
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Department of Physics, Gothenburg University, SE-41296 Gothenburg, Sweden.
Hansen
K
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Kjellberg
M
M
Popok
V N
VN
Campbell
E E B
EE