MULTIPLICITY SCALING IN NUCLEAR FRAGMENTATION

Calculations in the quantum statistical model show that the number of intermediate mass fragments produced from hot nuclei scales according to mass for relatively heavy emitting systems. Contrary to experimenta l observation, discernible deviations from scaling are observed for li ght sources. Similar scaling behavior is seen for the total number of charged particles produced as well as for the individual fragment spec ies. The scaling pattern remains unaltered with the inclusion of colle ctive radial flow. The calculated results with a moderate amount of co llective Bow energy in the total excitation are in consonance with the experimental data. Calculations in the model of sequential binary dec ay with temperature-dependent barriers are also found to reproduce sca ling quite well.