Low-energy M1 excitations in ${}^{208}$Pb and the spin channel of the Skyrme energy-density functional

Abstract

We investigate the spin dependent part of the Skyrme energy-density functional, in particular its impact on the residual particle-hole interaction in self-consistent calculations of excitations. Test cases are the low-energy M1 excitations in ${}^{208}$Pb treated within the self-consistent random-phase approximation based on the Skyrme energy-density functional. We investigate different parametrizations of the functionals to find out which parameters of the functional have strongest correlations with M1 properties. We explore a simple method of the modification of the spin-related parameters which delivers a better description of M1 excitations while basically maintaining the good description of ground state properties.

arXiv comment15 pages, 7 figures

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Cited by in corpus (12)

• Magnetic dipole excitations based on the relativistic nuclear energy density functional
• Microscopic analysis of low-energy spin and orbital magnetic dipole excitations in deformed nuclei
• M1 resonance in ${}^{208}$Pb within the self-consistent phonon-coupling model
• Role of residual interaction in the relativistic description of M1 excitation
• Non-iterative finite amplitude methods for E1 and M1 giant resonances
• The evolution of magnetic dipole strength in ${}^{100-140}$ Sn isotope chain and quenching of nucleon g factors
• QRPA calculations for M1 transitions with the noniterative finite amplitude method and the application to neutron radiative capture cross sections
• Benchmark of many-body approaches for magnetic dipole transition strength
• Symmetry breaking of Gamow-Teller and magnetic-dipole transitions and its restoration in calcium isotopes
• Microscopic analysis of dipole electric and magnetic strengths in ${}^{156}$Gd
• Spurious dipole mode in random-phase approximation and in the RPA-based models
• Self-consistent description of high-spin states in doubly magic ${}^{208}$Pb