Linear response of light deformed nuclei investigated by self-consistent quasiparticle random-phase-approximation

Abstract

We present a calculation of the properties of vibrational states in deformed, axially--symmetric even--even nuclei, within the framework of a fully self--consistent Quasparticle Random Phase Approximation (QRPA). The same Skyrme energy density and density-dependent pairing functionals are used to calculate the mean field and the residual interaction in the particle-hole and particle-particle channels. We have tested our software in the case of spherical nuclei against fully self consistent calculations published in the literature, finding excellent agreement. We investigate the consequences of neglecting the spin-orbit and Coulomb residual interactions in QRPA. Furthermore we discuss the improvement obtained in the QRPA result associated with the removal of spurious modes. Isoscalar and isovector responses in the deformed ${}^{24-26}$Mg, ${}^{34}$Mg isotopes are presented and compared to experimental findings.

References in corpus (4)

• Role of deformation on giant resonances within the QRPA approach and the Gogny force
• Self-consistent description of multipole strength: systematic calculations
• Low-frequency $K^{\pi }=0^{+}$ modes in deformed neutron-rich nuclei: Pairing- and $\beta$-vibrational modes of neutron
• Core polarization for the electric quadrupole moment of neutron-rich Aluminum isotopes

Cited by in corpus (4)

• Finite amplitude method for the quasi-particle-random-phase approximation
• Dipole responses in Nd and Sm isotopes with shape transitions
• Quasiparticle Random Phase Approximation with Interactions from the Similarity Renormalization Group
• Triaxial quadrupole deformation dynamics in sd-shell nuclei around 26Mg