Extraction of the multifragmentation time scale in intermediate energy heavy-ion reactions

The spatial and temporal extent of a system decaying by multifragment emission is deduced. Two-particle intermediate mass fragment correlation functions measured for central ${}_{}{}^{36}{}_{}{}^{}\mathrm{Ar}$${+}^{197}$Au collisions at E/A=50–110 MeV indicate a rapid decay, <75 fm/c, of the highly excited system. Furthermore, the behavior of the correlation function at large relative velocities suggests that considerable charge loss occurs prior to fragment emission.