$^{252}$Lr, see Fig \[figb109\_167\]. The second minimum, which was barely outlined in $^{270}$Db, is more pronounced here, giving the fission barrier a double-hump structure. The deformation $\beta_{20}\approx 0.5$ of the second saddle is much smaller than that of the second barriers in actinides. Thus, a two-peak structure of the barrier in SH nuclei may be viewed as a result of a division (split) of the first barrier, occurring with growing $Z$. The higher second axial saddle is lowered by triaxiality by $\approx$ 1.5 MeV, but eventually is still higher than the first axial saddle.

![The same as in \[figb103\_149\] but for $Z=109$ and $N=167$.[]{data-label="figb109_167"}](109_167.EPS){width="1.2\linewidth" height="3.2in"}

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For $^{280}$Ds a topology of the PES is even more complicated. We see several minima: prolate - the g.s. and a superdeformed one, and a shallow oblate. The map shows also a few saddles. The axially deformed saddle point at $\beta_{20} =0.3$ has a similar height as the nonaxial saddle at $\beta_{20} =0.54$ and $\beta_{22} =0.12$. It follows from the IWF calculation that the second fission barrier is nonaxial in this case. The axial second saddle is lowered by $\approx 1$ MeV owing to the nonaxiallity.

![The same as in \[figb103\_149\] but for $Z=112$ 