Further explorations of Skyrme-Hartree-Fock-Bogoliubov mass formulas. VII. Simultaneous fits to masses and fission barriers

Abstract

We present a new Hartree-Fock-Bogoliubov mass model, HFB-14, that is fitted to the fission data through adjustment of a vibrational term in the phenomenological collective correction. The rms deviation of the model from the 2149 measured masses of nuclei with $Z,N\ensuremath{\geqslant}8$ is 0.729 MeV. The rms deviation for all 77 primary barriers listed in the RIPL-2 data compilation is 1.31 MeV, and only 0.67 MeV for the 52 primary barriers of nuclei lower than 9 MeV, the ones of greater astrophysical interest. A similar accuracy is obtained (0.65 MeV) for the 45 secondary experimental barriers necessary for a reliable calculation of fission probabilities.