A new derivation of symmetry energy from nuclei beyond the β-stability line

Abstract

We suggest the procedure of direct derivation of the symmetry energy from the shift of neutron-proton chemical potentials Δλ=λ_{n}- λ_{p} for nuclei beyond the beta-stability line. We observe the presence of anomalous strong (about 15%) shell oscillations at the symmetry energy coefficient b_{sym}. Our results do not confirm the existence of exceptionally large values of the symmetry energy coefficient at mass number A\approx 100 which was earlier reported in Ref.[2]. Using the fitting procedure, we have evaluated the volume, b_{sym,vol}, and surface, b_{sym,surf}, contributions to the symmetry energy. We have estimated the experimental value of surface-to-volume ratio as r_{S/V}=|b_{sym,surf}}|/b_{sym,vol}\approx 1.7 for the fitting interval A\geq 50.

10 pages, 4 figures References added, small text and abstract changes

Cited by in corpus (11)

• Symmetry Energy II: Isobaric Analog States
• Surface Symmetry Energy of Nuclear Energy Density Functionals
• Surface properties of neutron-rich exotic nuclei: A source for studying the nuclear symmetry energy
• The surface properties of neutron-rich exotic nuclei within relativistic mean field formalisms
• Extraction of the symmetry energy coefficients from the masses differences of isobaric nuclei
• Volume and surface contributions to the nuclear symmetry energy within the coherent density fluctuation model
• Mass and isospin dependence of symmetry energy coefficients of finite nuclei
• Temperature dependence of the volume and surface contributions to the nuclear symmetry energy within the coherent density fluctuation model
• Systematic study of the symmetry energy coefficient in finite nuclei
• Nucleon distribution in nuclei beyond β-stability line
• Gibbs-Tolman approach to the curved interface effects in asymmetric nuclei