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Snapshot from a molecular dynamics simulation of a cluster ion striking an already cratered silver surface. The color of each atom indicates its kinetic energy, from 39 meV (300 K; red) to 1.5 keV (12 MK; blue). [K. O. Henriksson, K. Nordlund, and J. Keinonen, Phys. Rev. B 76, 245428 (2007)] |


