EXPERIMENTAL-EVIDENCE FOR THE REDUCIBILITY OF MULTIFRAGMENT EMISSION PROBABILITIES

Multifragmentation has been studied for Ar-36-induced reactions on a A u-197 target at E/A = 80 and 110 MeV and for Xe-129-induced reactions on several targets (Cu-nat, Y-89, Ho-165, Au-197) at E/A = 40, 50 and 60 MeV. The probability of emitting n intermediate-mass-fragments is s hown to be binomial at each transversal energy and reducible to an ele mentary binary probability p. For each target and at, each bombarding energy, this probability p shows a thermal nature by giving linear Arr henius plots. For the Xe-129-induced reactions, a nearly universal lin ear Arrhenius plot is observed at each bombarding energy, indicating a large degree of target independence.