Study of system-size effects in multi-fragmentation using quantum molecular dynamics model

We report, for the first time. the dependence of the multiplicity of differ ent fragments on the system size employing a quantum molecular dynamics mod el. This dependence is extracted from the simulations of symmetric collisio ns of Ca + Ca, Ni + Ni, Nb + Nb. Xe + Xe, Er + Er, Au + Au and U + U at inc ident energies between 50 A MeV and 1 A GeV. We find that the multiplicity of different fragments scales with the size of the system which can be para meterized by a simple power law. (C) 2001 Elsevier Science B.V. All rights reserved.