Participant-spectator dynamics on peak mass production of IMFs

The reaction dynamics of mass asymmetric systems (where the mass asymmetry of reaction is defined as η = ǀ A_T-A_P/A_T+A_P ǀ; A_T (A_P) is the mass of target (projectile) is quite different from symmetric systems was first noted by FOPI group. It was found that in symmetric reactions (η = 0) the excitation energy is deposited in the form of compressional energy whereas in case of asymmetric reactions (η ≠ 0) most of the excitation energy deposited in the composite system is in the form of thermal energy. We perform a study to disentangle the contribution of spectator and participant matter in the peak production of IMFs for various mass asymmetric reactions. The Isospin-dependent Quantum Molecular Dynamics (IQMD) model along with clusertization algorithm based on spatial constraints is used for the present study