Spreading widths of giant resonances in spherical nuclei: damped transient response

Abstract

We propose the universal approach to describe spreading widths of monopole, dipole and quadrupole giant resonances in heavy and superheavy spherical nuclei. Our approach is based on the ideas of the random matrix distribution of the coupling between one-phonon and two-phonon states generated in the random phase approximation. We use the Skyrme interaction SLy4 as our model Hamiltonian to create a single-particle spectrum and to analyze excited states of the doubly magic nuclei ${}^{132}$Sn, ${}^{208}$Pb and ${}^{310}$126. Our results demonstrate that the universal approach enables to describe gross structure of the spreading widths of the considered giant resonances.

6 pages, 2 figures

References in corpus (3)

• Chaos and regularity in the doubly magic nucleus 208Pb
• First clear evidence of quantum chaos in the bound states of an atomic nucleus
• Random matrix analysis of the monopole strength distribution in ${}^{208}$Pb

Cited by in corpus (7)

• Effective density functionals beyond mean field
• A systematic study of giant quadrupole resonances with the subtracted second random--phase approximation: beyond--mean--field centroids and fragmentation
• Microscopic Description of Isoscalar Giant Monopole Resonance in ${}^{48}$Ca
• Microscopic description of the pygmy dipole resonance in neutron-rich Ca isotopes
• Comment on "Spreading widths of giant resonances in spherical nuclei: damped transient response" by Severyukhin et al. [arXiv:1703.05710]
• Spreading widths of giant monopole resonance in the lead region: Random matrix approach
• Two-phonon structures for beta-decay theory