Collisionless fragmentation of small super-heated Ni_n, n=4-6, clusters: molecular dynamics computer-simulation study

摘要

Collisionless fragmentation of non-rotating super-heated small Ni_n, n=4-6, clusters are studied using microcanonical molecular-dynamics simulations. Survival probabilities and global fragmentation rate constants are computed and analysed as functions of the internal energy and of the size of the clusters. The dynamics of the fragmentation process is analysed in terms of characteristic quantities such as the distance between the centre of mass of the fragments and their interaction energy, all considered as functions of time.