Abstract
Fully consistent axially-symmetric-deformed quasiparticle random phase approximation calculations have been performed with the D1S Gogny force. A brief review on the main results obtained in this approach is presented. After a reminder on the method and on the first results concerning giant resonances in deformed Mg and Si isotopes, the multipole responses up to octupole in the deformed and heavy nucleus 238U are discussed. In order to analyse soft dipole modes in exotic nuclei, the dipole responses have been studied in Ne isotopes and in N=16 isotopes, for which results are presented. In these nuclei, the QRPA results on the low lying 2+ states are compared to the 5-Dimensional Collective Hamiltonian ones. © Owned by the authors, published by EDP Sciences, 2014.
Highlights
One challenge in theoretical nuclear physics is the development of a single approach enabling to describe the excited states of all nuclear systems with the same accuracy
Quasi-particle Random Phase Approximation (QRPA) formalism has been found to be successful in predicting low-lying multipole vibrations as well as giant resonances
A fully consistent description of resonances in both spherical and axially-deformed nuclei has been undertaken using the QRPA based on Hartree-FockBogolyubov (HFB) states calculated with the Gogny D1S effective force [1, 2]
Summary
One challenge in theoretical nuclear physics is the development of a single approach enabling to describe the excited states of all nuclear systems with the same accuracy. Quasi-particle Random Phase Approximation (QRPA) formalism has been found to be successful in predicting low-lying multipole vibrations as well as giant resonances. These latter provide key informations on nuclear finite-system properties. In order to analyse the mechanisms behind the existence of soft dipole modes in exotic nuclei, theoretical results of the dipole responses in Ne isotopes and in N=16 isotopes are presented. In these nuclei, QRPA results on the low-lying 2+ states are compared to the 5-Dimensional Collective Hamiltonian ones
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