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

Journal Article · Sat Mar 15 00:00:00 EDT 2008 · Physical Review. C, Nuclear Physics

DOI:https://doi.org/10.1103/PHYSREVC.77.031301· OSTI ID:21189810

Goriely, S ^[1]; Pearson, J M ^[2]

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1. Institut d'Astronomie et d'Astrophysique, ULB-CP226, 1050 Brussels (Belgium)
2. Departement de Physique, Universite de Montreal, Montreal, Quebec, H3C 3J7 (Canada)

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, {sigma}{sub rms} 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, {beta}-decay energies and fission barriers are very much smaller.

• OSTI ID: 21189810
• Journal Information: Physical Review. C, Nuclear Physics, Vol. 77, Issue 3; Other Information: DOI: 10.1103/PhysRevC.77.031301; (c) 2008 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA); ISSN 0556-2813
• Country of Publication: United States
• Language: English

Related Subjects

73 NUCLEAR PHYSICS AND RADIATION PHYSICS
BETA DECAY
CORRELATIONS
EXTRAPOLATION
FISSION BARRIER
HARTREE-FOCK-BOGOLYUBOV THEORY
KEV RANGE 100-1000
MASS
MASS FORMULAE
MEV RANGE
MIRROR NUCLEI
NEUTRON SEPARATION ENERGY
NEUTRON-RICH ISOTOPES
NOLEN-SCHIFFER ANOMALY
NUCLEAR FORCES
SIMULATION
SKYRME POTENTIAL
SYMMETRY BREAKING