  The fragment production in multifragmentation of finite nuclei is affected by
the critical temperature of nuclear matter. We show that this temperature can
be determined on the basis of the statistical multifragmentation model (SMM) by
analyzing the evolution of fragment distributions with the excitation energy.
This method can reveal a decrease of the critical temperature that, e.g., is
expected for neutron-rich matter. The influence of isospin on fragment
distributions is also discussed.
