CLUSTER FORMATION IN NUCLEAR MULTIFRAGMENTATION

The problem of fragment formation in excited systems is investigated b oth for excited finite and expanding infinite systems. For finite syst ems we present recent results obtained in the frame of the Quantum Mol ecular Dynamics model(QMD). For infinite systems we use a molecular dy namics method that simulates the behavior of condensed matter under ho mogeneous adiabatic expansion,. In both cases we investigate the time evolution of the most bound fluctuations in phase-space using the Earl y Cluster Recognition Algorithm (ECRA) and their relation to the final cluster spectrum.