Further explorations of Skyrme-Hartree-Fock-Bogoliubov mass formulas. VIII. Role of Coulomb exchange

Details Further explorations of Skyrme-Hartree-Fock-Bogoliubov mass formulas. VIII. Role of Coulomb exchange Further explorations of Skyrme-Hartree-Fock-Bogoliubov mass formulas. VIII. Role of Coulomb exchange

Mar 2008

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008phrvc..77c1301g&link_type=abstract

Physical Review C, vol. 77, Issue 3, id. 031301

Physics

Nuclear Physics

15

Forces In Hadronic Systems And Effective Interactions, Hartree-Fock And Random-Phase Approximations, Nuclear Physics Aspects Of Novae, Supernovae, And Other Explosive Environments, Nuclear Matter Aspects Of Neutron Stars

Scientific paper

Following suggestions that the energy associated with Coulomb correlations and a possible charge-symmetry breaking of nuclear forces might largely cancel the Coulomb-exchange term, we refit the HFB-14 mass model without the Coulomb-exchange term to essentially all the mass data. The resulting mass model, HFB-15, gives a better fit to the 2149 mass data, σrms falling from 0.729 to 0.678 MeV. The improvement in the energy differences between mirror nuclei is particularly striking: the Nolen-Schiffer anomaly, which is strong for HFB-14, is essentially eliminated. As for the extrapolation to highly neutron-rich nuclei, the HFB-15 model differs significantly from HFB-14, with up to 15 MeV less binding being predicted. However, the differences in the predicted values of differential quantities such as the neutron-separation energies, β-decay energies and fission barriers are very much smaller.

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