Tensor correlation, pairing interaction and deformation in Ne isotopes and Ne hypernuclei

Abstract

We study tensor and pairing effects on the quadruple deformation of neon isotopes based on a deformed Skyrme-Hartree-Fock model with BCS approximation for the pairing channel. We extend the Skyrme-Hartree-Fock formalism for the description of single- and double-lambda hypernuclei adopting two different hyperon-nucleon interactions. It is found that the interplay of pairing and tensor interactions is crucial to derive the deformations in several neon isotopes. Especially, the shapes of ${}^{26,30}$Ne are studied in details in comparisons with experimentally observed shapes. Furthermore the deformations of the hypernuclei are compared with the corresponding neon isotopic cores in the presence of tensor force. We find the same shapes with somewhat smaller deformations for single $\Lambda$-hypernuclei compared with their core deformations. It is also pointed out that the latest version of hyperon interaction, the ESC08b model, having a deeper $\Lambda$ potential makes smaller deformations for hypernuclei than those of another NSC97f model.

13 pages, 5 figures, Physical Review C 2013 in press

References in corpus (11)

• Spin-orbit splitting and the tensor component of the Skyrme interaction
• Tensor interaction contributions to single-particle energies
• Evolution of nuclear shells with the Skyrme density dependent interaction
• Spin-orbit and tensor mean-field effects on spin-orbit splitting including self-consistent core polarizations
• Deformation of Lambda hypernuclei
• BCS-BEC crossover of neutron pairs in symmetric and asymmetric nuclear matter
• Effective pairing interactions with isospin density dependence
• Deformation of hypernuclei studied with antisymmetirzed molecular dynamics
• Evolution of the proton sd states in neutron-rich Ca isotopes
• A mean field study of single-particle spectra evolution in Z=14 and N=28 chains
• Relativistic Hartree-Fock-Bogoliubov model for deformed nuclei