Multifragmentation of lead nuclei at 158 AGeV

Multifragment emission following Pb-Pb and Pb-Plastic collisions at 158 AGe V has been studied with a set of emulsion chambers of the EMU13 CERN experi ment. it was found that the probability of nuclear multifragmentation incre ases with increasing mass of the target nucleus. For Pb-Pb collisions, mult ifragmentation events represent more than 30% of the total charge changing cross section. On the other hand characteristics of multifragmentation are found to be independent of the mass of the target. A comparison is made wit h the results for Au multifragmentation after the collisions with emulsion nuclei at lower energies. The results suggest that above 10 AGeV the featur es of multifragmentation processes are energy independent.