  Within the framework of the dinuclear system model, the production mechanism
of neutron-rich heavy nuclei around N = 162 has been investigated
systematically. The isotopic yields in the multinucleon transfer reaction of
$^{238}$U + $^{248}$Cm was analyzed and compared the available experimental
data. Systematics on the production of superheavy nuclei via $^{238}$U on
$^{252,254}$Cf, $^{254}$Es and $^{257}$Fm is investigated. It is found that the
shell effect is of importance in the formation of neutron-rich nuclei around
N=162 owing to the enhancement of fission barrier. The fragments in the
multinucleon transfer reactions manifest the broad isotopic distribution and
are dependent on the beam energy. The polar angles of the fragments tend to the
forward emission with increasing the beam energy. The production cross sections
of new isotopes are estimated and heavier targets are available for the
neutron-rich superheavy nucleus formation. The optimal system and beam energy
are proposed for the future experimental measurements.
