S. Date et al., A STUDY OF COLLISION FREQUENCY AND PARTICLE DENSITY IN ULTRARELATIVISTIC NUCLEAR COLLISIONS BY AN EVENT GENERATOR URASIMA, Journal of the Physical Society of Japan, 64(3), 1995, pp. 766-776
Local collision frequencies of produced hadrons in ultrarelativistic n
ucleus-nucleus collisions are studied by an event generator URASiMA. F
rom these frequencies, local number densities of produced hadrons are
derived. It turns out that thermalized high density local system is ac
hievable in CERN-SPS energy region although its size is not always lar
ge. Time evolution and nuclear mass number dependence of these quantit
ies, frequency and density, are also investigated.