Genetic algorithm study on the stable structures of (C_(60))_N slusters

By using Pacheco-Ramalho inter-molecular potential together with the improved genetic algorithm,the stable structures,the "magic numbers" as well as the potential energies of the(C_(60))_N clusters(N=3 up to 25) have been studied.The present results show that the stable structures of the(C_(60))_N clusters are very sensitive to the number of C_(60) in the clusters.As the number of C_(60) molecules increases,the stable structure of the cluster displays a tendency forming from tier structure to shell structure,and then back to tier structure,and the averaged potential energy of C_(60) decreases gradually.