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Shape evolution in yttrium and niobium neutron-rich isotopes

AuthorsRodriguez-Guzmán, R.; Sarriguren, Pedro ; Robledo, L.M.
Keywords[PACS] Nuclear Density Functional Theory and extensions (includes Hartree-Fock and random-phase approximations)
[PACS] Single-particle levels and strength functions
[PACS] Properties of specific nuclei listed by mass ranges 90 ≤ A ≤ 149
Issue Date11-Apr-2011
PublisherAmerican Physical Society
CitationPhysical Review - Section C - Nuclear Physics 83, 044307 (2011)
AbstractThe isotopic evolution of the ground-state nuclear shapes and the systematics of one-quasiproton configurations are studied in neutron-rich odd-A yttrium and niobium isotopes. We use a self-consistent Hartree-Fock-Bogoliubov formalism based on the Gogny energy density functional with two parametrizations, D1S and D1M. The equal-filling approximation is used to describe odd-A nuclei preserving both axial and time-reversal symmetries. Shape-transition signatures are identified in the N = 60 isotopes in both the charge radii and spin parities of the ground states. These signatures are a common characteristic for nuclei in the whole mass region. The nuclear deformation and shape coexistence inherent to this mass region are shown to play a relevant role in the understanding of the spectroscopic features of the ground and low-lying one-quasiproton states. Finally, a global picture of the neutron-rich A ∼ 100 mass region from krypton up to molybdenum isotopes is illustrated with the systematics of the nuclear charge radii isotopic shifts.
Description11 págs. ; 14 figs.
Publisher version (URL)http://dx.doi.org/10.1103/PhysRevC.83.044307
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