On the participant-spectator matter and thermalization of neutron-rich   systems in heavy-ion collisions
  We study the participant-spectator matter at the energy of vanishing flow for neutron-rich systems. Our study reveals similar behaviour of articipant-spectator for neutron-rich systems as for stable systems and also points towards nearly mass independence behaviour of participant-spectator matter for neutron-rich systems at the energy of vanishing flow. We also study the thermalization reached in the reactions of neutron-rich systems. 
Sakshi Gautam and Rajeev K. Puri
nucl-th