Statistical properties of fragment isospin in multifragmentation
  It is shown that the chemical equilibrium condition of the system can be unambiguously identified by analyzing the isospin evolution of fragments produced in nuclear multifragmentation process. As far as the chemical equilibrium is established, the isotope production can be used for finding properties of nuclear matter and fragments in the freeze-out volume, for example, via the isoscaling phenomenon. 
A.S. Botvina (GSI, Darmstadt, Germany and INR, Moscow, Russia)