Isospin-symmetry breaking in masses of N ≃ Z nuclei
Ba̧czyk, P., Dobaczewski, J., Konieczka, M., Satuła, W., Nakatsukasa, T., & Sato, K. (2018). Isospin-symmetry breaking in masses of N ≃ Z nuclei. Physics Letters B, 778, 178-183. doi:10.1016/j.physletb.2017.12.068
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Physics Letters BDate
2018Copyright
© 2018 The Author(s). Published by Elsevier B.V. This is an open access article under the CC BY license. Funded by SCOAP3.
Effects of the isospin-symmetry breaking (ISB) beyond mean-field Coulomb terms are systematically
studied in nuclear masses near the N = Z line. The Coulomb exchange contributions are calculated
exactly. We use extended Skyrme energy density functionals (EDFs) with proton–neutron-mixed densities,
to which we add new terms breaking the isospin symmetry. Two parameters associated with the new
terms are determined by fitting mirror and triplet displacement energies (MDEs and TDEs) of isospin
multiplets. The new EDFs reproduce MDEs for the T = 1
2 doublets and T = 1 triplets, and TDEs for the
T = 1 triplets. Relative strengths of the obtained isospin-symmetry-breaking terms are not consistent with
the differences in the N N scattering lengths, ann, app , and anp. Based on low-energy experimental data, it
seems thus impossible to delineate the strong-force ISB effects from beyond-mean-field Coulomb-energy
corrections.
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Elsevier, North-HollandISSN Search the Publication Forum
0370-2693Keywords
ydinfysiikka tiheys tiheysfunktionaaliteoria energia protonit neutronit nuclear physics density density functional theory energy protons neutrons nuclear density functional theory (DFT) energy density functional (EDF) proton–neutron mixing isospin symmetry breaking (ISB) mirror displacement energy (MDE) triplet displacement energy (TDE)
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Except where otherwise noted, this item's license is described as © 2018 The Author(s). Published by Elsevier B.V. This is an open access article under the CC BY license. Funded by SCOAP3.