Spin-isospin Response in Finite Nuclei from an Extended Skyrme Interaction

Abstract

The magnetic dipole (M1) and the Gamow-Teller (GT) excitations of finite nuclei have been studied in a fully self-consistent Hartree-Fock (HF) plus random phase approximation (RPA) approach by using a Skyrme energy density functional with spin and spin-isospin densities. To this end, we adopt the extended SLy5st interaction which includes spin-density dependent terms and stabilize nuclear matter with respect to spin instabilities. The effect of the spin-density dependent terms is examined in both the mean field and the spin-flip excited state calculations. The numerical results show that those terms give appreciable repulsive contributions to the M1 and GT response functions of finite nuclei.

6 pages, 2 figures

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Cited by in corpus (8)

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• M1 resonance in ${}^{208}$Pb within the self-consistent phonon-coupling model
• New quantification of symmetry energy from neutron skin thicknesses of ${}^{48}$Ca and ${}^{208}$Pb
• Sensitivity of $\beta$-decay rates to the radial dependence of the nucleon effective mass
• Benchmark of many-body approaches for magnetic dipole transition strength
• Exploring effects of tensor force and its strength via neutron drops