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Abstract: The fluctuations of the largest fragment charge of a partition and of thecharge asymmetries of the two or three largest fragments in spectator decaysfollowing 197Au + 197Au collisions at 1000 MeV per nucleon are investigated.The observed bimodal distributions at specific values of the sorting variableZ bound exhibit features known from percolation theory where they appear asfinite-size effects. The underlying configurational fluctuations seem genericfor fragmentation processes in small systems.

Author: W. Trautmann, the ALADIN Collaboration


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