The Giant Dipole Resonance as a quantitative constraint on the symmetry energy

Abstract

The possible constraints on the poorly determined symmetry part of the effective nuclear Hamiltonians or effective energy functionals, i.e., the so-called symmetry energy S(rho), are very much under debate. In the present work, we show that the value of the symmetry energy associated with Skyrme functionals, at densities rho around 0.1 fm^{-3}, is strongly correlated with the value of the centroid of the Giant Dipole Resonance (GDR) in spherical nuclei. Consequently, the experimental value of the GDR in, e.g., 208Pb can be used as a constraint on the symmetry energy, leading to 23.3 MeV < S(rho=0.1 fm^{-3}) < 24.9 MeV.

5 pages, 2 figures, submitted

References in corpus (1)

• Charge Exchange Spin-Dipole Excitations of 90Zr and 208Pb and Neutron Matter Equation of State

Cited by in corpus (4)

• Higher-order effects on the incompressibility of isospin asymmetric nuclear matter
• Neutron skin thickness in droplet model with surface width dependence: indications of softness of the nuclear symmetry energy
• Density dependence of symmetry free energy of hot nuclei
• A phenomenological equation of state for isospin asymmetric nuclear matter