Energy densities, target fragmentation and pion correlations in ultrarelativistic H. I. C., as predicted by SPACER
SPACER, a spacetime version of FRITIOF is applied to the calculation of the flow velocity field, local rest densities and energy densities for the case of 14.5 AGeV Si28 + Au197 collisions as well as 200 AGeV O16, S32 + Au197 collisions. At CERN energies, the model predicts a 25-30% overall increase in local rest (energy) densities, when using S32 instead of the O16 projectile. SPACER suggests a strong spectator fragmentation. This effect is taken into account with the help of a simple analytic model, which implies an experimentally observed scaling in the angular distribution of target associated particles. SPACER predicts that the shape of the two-pion correlation function C( QI) is exponential with chaocity parameter close to 1.