  For midrapidity fragments from central 50-200 AMeV Au+Au collisions
temperatures from double ratios of isotopic yields were compared with
temperatures from particle unbound states. Temperatures from particle unbound
states with T = 4-5 MeV show with increasing beam energy an increasing
difference to temperatures from double ratios of isotopic yields, which
increase from T = 5MeV to T = 12MeV. The lower temperatures extracted from
particle unstable states can be explained by increasing cooling of the decaying
system due to expansion. This expansion is driven by the radial flow, and
freeze out of particle unstable states might depend on the dynamics of the
expanding system. Source sizes from pp-correlation functions were found to be 9
to 11 fm.
