Spectator and participant decay in heavy ion collisions

Abstract

We analyze the thermodynamical state of nuclear matter in transport calculations of heavy--ion reactions. In particular we determine temperatures and radial flow parameters from an analysis of fragment energy spectra and compare to local microscopic temperatures obtained from an analysis of local momentum space distributions. The analysis shows that the spectator reaches an equilibrated freeze-out configuration which undergoes simultaneous fragmentation. The fragments from the participant region, on the other hand, do not seem to come from a common fragmenting source, but rather heavier fragments seem to be formed earlier.

16 pages, 5 postscript figures, to appear in Phys. Lett. B

References in corpus (1)

• Flow angle from intermediate mass fragment measurements

Cited by in corpus (11)

• Microscopic model approaches to fragmentation of nuclei and phase transitions in nuclear matter
• Fragment Kinetic Energies and Modes of Fragment Formation
• Thermal and Chemical Freeze-out in Spectator Fragmentation
• Fragmentation in Peripheral Heavy-Ion Collisions: from Neck Emission to Spectator Decays
• Spectator Response to the Participant Blast
• Dynamical constraints on phase transitions
• Multiplicity correlations of intermediate-mass fragments with pions and fast protons in 12C + 197Au
• Fragment Formation in Central Heavy Ion Collisions at Relativistic Energies
• Projectile fragment emission in fragmentation of ${}^{56}$Fe on C, Al,and CH${}_2$ targets at 471 A MeV
• Correlation and isospin dynamics of participant-spectator matter in neutron-rich colliding nuclei at 50 MeV/nucleon
• Remarks on the non-equilibrium effects and collision dynamics in heavy-ion collisions