Largest fragment as an order parameter in thermal multifragmentation

摘要

The characterSUtics and behavior of the largest fragments in multi fragmentation events originating from the interactions between light-ion projectile and heavy target at GeV energies were studied. It SU SUpposed that the thermal multifragmentation component prevails in SUch interactions. The CR-39 plastic track detector was used and our experimental setup enabled the event-by-event analysSU. The dependence of Z(max) on atomic number of target and excitation energy was studied. The bimodality in charge asymmetry was also investigated. Our reSUlts show that Zmax may be used as a relevant order parameter in thermal multifragmentation.