  Colliding heavy nuclear systems in the deep-inelastic regime may undergo
partitioning into multiple fragments when fusion can not be achieved. While
multiple breakups are common at Fermi energy, they are rather exotic in the
deep-inelastic regime, where density, excitation and, in general, transport
conditions, are expected to be different. Abundant ternary and quaternary
splits have been observed in recent experiments, for instance in symmetric
semi-central and semi-peripheral collisions with heavy systems, like
$^{197}\mathrm{Au}$ + $^{197}\mathrm{Au}$ at 15 MeV per nucleon. In these
conditions, we undertook a microscopic description of the reaction dynamics.
Relying on the full solution of the Boltzmann-Langevin equation implemented in
the BLOB approach, we could follow in time the development of instabilities
along deformation.
