Extended random-phase-approximation study of fragmentation of giant quadrupole resonance in ${}^{16}$O

Abstract

The damping of isoscalar giant quadrupole resonance in ${}^{16}$O is studied using extended random-phase-approximation approaches derived from the time-dependent density-matrix theory. It is pointed out that the effects of ground-state correlations bring strong fragmentation of quadrupole strength even if the number of two particle--two hole configurations is strongly limited.

arXiv comment4 pages, 5 figures

References in corpus (4)

• Extended Theory of Finite Fermi Systems (Collective Vibrations in Closed Shell Nuclei)
• Time-reversed particle-vibration loops and nuclear Gamow-Teller response
• Toward an accurate strongly-coupled many-body theory within the equation of motion framework
• Equation of Motion Method to strongly correlated Fermi systems and Extended RPA approaches