Cluster-size dependence of ranges of 100Â eV/atom Aun clusters

Using molecular-dynamics simulation, we determine the ranges of Aun clusters (n = 1, 13, 43, 87, 201, 402) at fixed energy per atom, 100 eV/atom. We study three targets with different bonding properties and mass: a condensed amorphous argon sample, a gold crystal with a (1 0 0) surface and a graphite crystal with a (1 0 0 0) surface. We find that the ranges follow a power law R ∝ nα, where α ≅ 0.3 in a gold target and α ≅ 0.4 in the graphite and argon targets.