Date of Original Version
We describe measurements of the mass spectrum of charged argon clusters generated in a low-temperature free jet expansion. It contains detailed intensity variations which can be understood in terms of a simplified competing-lattice model of charged-cluster structure.
I. A. Harris, R. S. Kidwell, and J. A. Northby. (1984). "Structure of Charged Argon Clusters Formed in a Free Jet Expansion." Physical Review Letters, 53(25), 2390. Available at: http://dx.doi.org/10.1103/PhysRevLett.53.2390