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Event selection at lower incident energies

Exists a strong correlation between all impact parameter dependent observables. Possible to exclude peripheral collisions by gates on N c or E t. Event selection at lower incident energies. NPA A548 (1992) 489. QMD+SMM:Two-step hybrid model comparisons. E * /A the : Charge distribution

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Event selection at lower incident energies

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  1. Exists a strong correlation between all impact parameter dependent observables. Possible to exclude peripheral collisions by gates on Nc or Et Event selection at lower incident energies NPA A548 (1992) 489

  2. QMD+SMM:Two-step hybrid model comparisons E*/Athe: Charge distribution Asource : Fragment multiplicity Ecoll/A : <Et> = <Esin2q> Essentially perfect agreement is possible Williams et al.,(1997) PRC 55 (1997) R2132

  3. Source Parameters • Only a fraction of the available energy and mass can be considered thermalized. • Same problems are observed for central Au+Au collisions: E*/A > Ecoll/A + E*thermal/A. • Similar problems are observed in projectile multi-fragmentation and light induced multi-fragmentation. PRC 55 (1997) R2132

  4. Charge conservation constraints are too strong if reduced source is assumed. Two-steps are not really uncoupled. How isolated are these “equilibrated sources” Empirically: PRC 55 (1997) R557

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