Proton separation energy predictions for proton-rich nuclei with the radial basis function approach and mirror symmetry

Mirror symmetry is combined with the radial basis function (RBF) approach to improve the prediction accuracy of proton separation energy. Compared with the traditional RBF approach, the RBF approach combine with mirror symmetry (RBFms) mainly involves training the residual of the one/two-proton separation energy deviation of the nucleus and the one/two-neutron separation energy deviation of its mirror nucleus. The KTUY model combined with the RBFms approach yields an root-mean-square (rms) deviation of 0.113 MeV for one-proton separation energies of 143 nuclei, while the DZ31 model combined with the RBFms approach achieves rms deviation of 0.089 MeV for two-proton separation energies of 115 nuclei. In the region where the proton number Z=14-38, the proton drip line and two-proton decay candidate nucleus are predicted by DZ31, FRDM12, KTUY, and WS4 models combine with the RBFms approach.