  Experimental data on multi-fragmentation of residual krypton nuclei created
in the interactions of the krypton nuclei with photoemulsion nuclei at the
energy of 0.9 GeV per nucleon are presented in a comparison with the analogous
data on fragmentation of gold residual nuclei at the energy of 10.7
GeV/nucleon. It is shown for the first time that there are two regimes of
nuclear multifragmentation: the former is when less than one-half of nucleons
of projectile nucleus are knocked out, the latter is when more than one-half of
nucleons are knocked out. Residual nuclei with closed masses created at
different reactions are fragmenting practically simultaneously when more than
one-half of nucleons of original nuclei are knocked out. The evidence of
existence of a radial flow of the spectator fragment at the decay of residual
krypton nuclei is found.
