The Gamow-Teller response within Skyrme random-phase approximation plus particle-vibration coupling

Abstract

Although many random-phase approximation (RPA) calculations of the Gamow-Teller (GT) response exist, this is not the case for calculations going beyond the mean-field approximation. We apply a consistent model that includes the coupling of the GT resonance to low-lying vibrations, to nuclei of the $fp$ shell. Among other motivations, our goal is to see if the particle-vibration coupling can redistribute the low-lying GT${}^{+}$ strength that is relevant for electron-capture processes in core-collapse supernova. We conclude that the lowering and fragmentation of that strength are consistent with the experimental findings and validate our model. However, the particle-vibration coupling cannot account for the quenching of the total value of the low-lying strength.

25 pages, 10 figures

References in corpus (18)

• Theory of Core-Collapse Supernovae
• Nuclear weak-interaction processes in stars
• Exotic modes of excitation in atomic nuclei far from stability
• Skyrme-Hartree-Fock-Bogoliubov nuclear mass formulas: Crossing the 0.6 MeV threshold with microscopically deduced pairing
• Shape Coexistence and the Effective Nucleon-Nucleon Interaction
• Gamow-Teller strength and the spin-isospin coupling constants of the Skyrme energy functional
• Nuclear matter incompressibility coefficient in relativistic and nonrelativistic microscopic models
• Quasiparticle random phase approximation based on the relativistic Hartree-Bogoliubov model II: Nuclear spin and isospin excitations
• From Brueckner Approach to Skyrme-type Energy Density Functional
• Spin-isospin resonances: A self-consistent covariant description
• Escape and Spreading Properties of Charge-Exchange Resonances in Bi 208
• Isospin corrections for superallowed Fermi beta decay in self-consistent relativistic random phase approximation approaches
• Unblocking of the Gamow-Teller strength in stellar electron capture on neutron-rich Germanium isotopes
• Effect of Tensor Correlations on Gamow-Teller States in 90Zr and 208Pb
• Calculation of stellar electron-capture cross sections on nuclei based on microscopic Skyrme functionals
• Stellar electron-capture rates calculated with the finite-temperature relativistic random-phase approximation
• Electron capture on iron group nuclei
• Spin-isospin nuclear response using the existing microscopic Skyrme functionals

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