  Quasifission is the primary reaction mechanism that limits the formation of
superheavy nuclei and consequently an important ingredient for choosing the
best target-projectile combinations for the heavy element searches.
Quasifission is characterized by nuclear contact-times that are much longer
than those found in deep-inelastic reactions, resulting in a substantial mass
and charge transfer. In this manuscript we employ the fully microscopic
time-dependent Hartree-Fock (TDHF) theory to study quasifission. New results
are presented for the $^{48}$Ca+$^{249}$Bk system.
