Low-lying dipole resonance in neutron-rich Ne isotopes
| dc.creator | Yoshida, Kenichi | |
| dc.creator | Van Giai, Nguyen | |
| dc.date | 2008-02-12 | |
| dc.date.accessioned | 2026-07-07T11:40:16Z | |
| dc.date.available | 2026-07-07T11:40:16Z | |
| dc.description | Microscopic structure of the low-lying isovector dipole excitation mode in neutron-rich $^{26,28,30}$Ne is investigated by performing deformed quasiparticle-random-phase-approximation (QRPA) calculations. The particle-hole residual interaction is derived from a Skyrme force through a Landau-Migdal approximation. We have obtained the low-lying resonance in $^{26}$Ne at around 8.5 MeV. It is found that the isovector dipole strength at $E_{x}<10$ MeV exhausts about 6.0% of the classical Thomas-Reiche-Kuhn dipole sum rule. This excitation mode is composed of several QRPA eigenmodes, one is generated by a $ν(2s^{-1}_{1/2} 2p_{3/2})$ transition dominantly, and the other mostly by a $ν(2s^{-1}_{1/2} 2p_{1/2})$ transition. The neutron excitations take place outside of the nuclear surface reflecting the spatially extended structure of the $2s_{1/2}$ wave function. In $^{30}$Ne, the deformation splitting of the giant resonance is large, and the low-lying resonance is overlapping with the giant resonance. | |
| dc.description | 8 pages, 9 figures and 5 tables | |
| dc.identifier | https://arxiv.org/abs/0802.1687 | |
| dc.identifier | http://arxiv.org/abs/0802.1687 | |
| dc.identifier | Phys.Rev.C78:014305,2008 | |
| dc.identifier | doi:10.1103/PhysRevC.78.014305 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/200202 | |
| dc.subject | Nuclear Theory | |
| dc.title | Low-lying dipole resonance in neutron-rich Ne isotopes | |
| dc.type | text |