FISSION OF DOUBLY-CHARGED IRON AND ALUMINUM CLUSTERS

We present a statistical fragmentation study of doubly charged iron an d aluminum clusters of less than 60 atoms. At low excitation energies we find that the evaporation of one charged monomer is the most probab le decay channel (asymmetric fission). When the excitation energy incr eases there is a competition between evaporation of a charged monomer and a charged dimer. For higher energies the number of channels increa ses and the multifragmentation mode appears at about 2.5 eV/atom.