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

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

2009-09-30

arxiv.org/abs/0909.5618v2

Phys.Rev.C81:024324,2010

Physics

Nuclear Physics

Nuclear Theory

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

Scientific paper

10.1103/PhysRevC.81.024324

We suggest the procedure of direct derivation of the symmetry energy from the shift of neutron-proton chemical potentials \Delta\lambda=\lambda_{n}- \lambda_{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.

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