CLUSTER MATTER FORMATION IN CLUSTER COLLISIONS

Abstract

By using the tight-binding molecular dynamics simulations in cluster collisions, we give some evidences of the structures of ( Na 9)2 cluster dimer and ( Na 4)4 cluster tetramer from the dynamical point of view. We show that the ( Na 9)2 and ( Na 4)4 cluster matter may exist as intermediate states and finally decay to compact structure in real collision process. With a technique called "sharp cooling", the stable cluster structures ( Na 9)2 and ( Na 4)4 are brought into being to end. The eigen-mode frequencies of these clusters are obtained with Fourier transform of the velocity auto-correlation function which can characterize their structure properties.