Figure 1

Neutron and proton pairing strengths as a function of number $N_F$ of fermionic shells for different pairing schemes. Pairing schemes are indicated either by cutoff energy $E_{\mathrm{cutoff}}$ or by Eq. (13).Reuse & Permissions

Figure 2

Neutron and proton pairing energies in the normal deformed minimum as a function of number $N_F$ of fermionic shells for different pairing schemes.Reuse & Permissions

Figure 3

The dependence of additional binding due to pairing on the number $N_F$ of major fermionic shells for different pairing schemes.Reuse & Permissions

Figure 4

The dependence of fission barrier in ${}^{236}\mathrm{Pu}$ on the pairing scheme. Solid and dashed lines are used for axially symmetric and triaxial solutions, respectively.Reuse & Permissions

Figure 5

The same as in Fig. 4 but for ${}^{250}\mathrm{Cf}$.Reuse & Permissions

Figure 6

Potential energy surface in ${}^{240}\mathrm{Pu}$. The energy difference between two neighboring equipotential lines is equal to 0.5 MeV. The blue dashed line with solid circles shows the lowest in energy solution as a function of ${\beta }_2$. Further details are given in the text.Reuse & Permissions

Figure 7

Deformation energy curves of even-even actinide nuclei obtained in the RMF$+$BCS calculations with the NL3* parametrization. Black solid lines display the deformation energy curves for the axially symmetric solution, whereas red solid lines show the deformation energy curves along the triaxial part of the fission path. Solid green circles show the experimental values of the height of inner fission barrier. Experimental data are taken from Table IV in Ref. [48]. A typical uncertainty in the experimental values, as suggested by the differences among various compilations, is of the order of $\pm 0.5$ MeV [48].Reuse & Permissions

Figure 8

The $\gamma$ deformations for the results of calculations shown by red lines in Fig. 7.Reuse & Permissions

Figure 9

Proton and neutron single-particle energies in ${}^{242}\mathrm{Pu}$ as a function of the quadrupole deformation ${\beta }_2$ for the axially symmetric solution. Solid (black) and dashed (red) lines are used for positive and negative parity states, respectively. Blue boxes show the regions that are displayed in more details in Fig. 10 below. Fermi energies ${\varepsilon }_F$ are shown by dot-dot-dashed (green) lines.Reuse & Permissions

Figure 10

A comparison of proton and neutron single-particle energies at axially symmetric (left panels) and triaxial (right panels) solutions. The same notation for the lines as in Fig. 9 is used. Vertical blue dotted lines are used to show the deformation of the saddle point obtained in the axially symmetric solution.Reuse & Permissions

Figure 11

The difference between experimental and calculated heights of inner fission barriers as a function of neutron number $N$.Reuse & Permissions

Figure 12

The same as in Fig. 11 but as a function of proton number $Z$.Reuse & Permissions

Figure 13

The same as in Fig. 7 but for fission barriers in ${}^{240}\mathrm{Pu}$ and ${}^{236}\mathrm{U}$ obtained in the calculations with the NL3*, DD-ME2, and DD-PC1 parametrizations of the RMF Lagrangian.Reuse & Permissions