The complete charge distribution of products from Au nuclei fragmentin
g in nuclear emulsion at 10.7A GeV has been measured. Multiplicities o
f produced particles and particles associated with the target source a
re used to select peripheral and central events. A statistical analysi
s, based on event-by-event charge distributions, show that a populatio
n of subcritical, critical and supercritical events, i.e. a phase tran
sition like behaviour, is observed among peripheral collisions.