  We study the explosion mechanism of collapse-driven supernovae by numerical
simulations with a new nuclear EOS based on unstable nuclei. We report new
results of simulations of general relativistic hydrodynamics together with the
Boltzmann neutrino-transport in spherical symmetry. We adopt the new data set
of relativistic EOS and the conventional set of EOS (Lattimer-Swesty EOS) to
examine the influence on dynamics of core-collapse, bounce and shock
propagation. We follow the behavior of stalled shock more than 500 ms after the
bounce and compare the evolutions of supernova core.
