  Fission of $^{180}$Hg produces mass asymmetric fragments which are expected
to be influenced by deformed shell-effects at N=56 in the heavy fragment and
Z=34 in the light fragment [G. Scamps and C. Simenel, arXiv:1904.01275 (2019)].
To investigate both shell-effects and to determine which one has the main
influence on the asymmetry in the region of the $^{180}$Hg, we produce a
systematic of Constraint-Hartree-Fock calculations in nuclei with similar N/Z
ratio than the $^{178}$Pt. It is found that N=56 determines the asymmetry of
systems in this region of the nuclear chart.
