Deformations and electromagnetic moments in carbon and neon isotopes

Sagawa, H.; Zhou, Xian-Rong; Zhang, X. Z.; Suzuki, Tsuneo

doi:10.1103/physrevc.70.054316

Cited by 110 publications

(129 citation statements)

References 37 publications

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“…However, all structural details including the maximum just above N = 8 and the midshell minimum are less pronounced than in the [69] and Geng et al [68]. Additional calculated β 2 values of Lalazissis et al [71] and Sagawa et al [70] are shown in (b). The radii of the lighter isotopes 17−22 Ne are best described by the recent FMD approach [9].…”

Section: Theoretical Modelsmentioning

confidence: 96%

“…This is explained with the fully occupied d 5/2 orbital at N = 14 favoring oblate deformation [44]. Shape coexistence with very flat and nearly degenerate prolate and oblate energy minima is also found for the more neutron-rich isotopes [70]. In this context it would be interesting to measure the spectroscopic quadrupole moment of 27 Ne for which different shapes are predicted.…”

Section: Theoretical Modelsmentioning

confidence: 99%

“…9(a). The deformations from both models, and from additional calculations using a deformed Skyrme Hartree-Fock model [70] and a relativistic Hartree-Bogoliubov model with Gogny interaction [71], fit to those obtained for just the even-even isotopes. Strong deformation is predicted to exist in the range of 19 Ne or 20 Ne to 23 Ne.…”

Section: Theoretical Modelsmentioning

confidence: 99%

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Charge radii of neon isotopes across thesdneutron shell

et al. 2011

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We report on the changes in mean square charge radii of unstable neon nuclei relative to the stable 20 Ne, based on the measurement of optical isotope shifts. The studies were carried out using collinear laser spectroscopy on a fast beam of neutral neon atoms. High sensitivity on short-lived isotopes was achieved thanks to nonoptical detection based on optical pumping and state-selective collisional ionization, which was complemented by an accurate determination of the beam kinetic energy. The new results provide information on the structural changes in the sequence of neon isotopes all across the neutron sd shell, ranging from the proton drip line nucleus and halo candidate 17 Ne up to the neutron-rich 28 Ne in the vicinity of the "island of inversion." Within this range the charge radius is smallest for 24 Ne with N = 14 corresponding to the closure of the neutron d 5/2 shell, while it increases toward both neutron shell closures, N = 8 and N = 20. The general trend of the charge radii correlates well with the deformation effects which are known to be large for several neon isotopes. In the neutron-deficient isotopes, structural changes arise from the onset of proton-halo formation for 17 Ne, shell closure in 18 Ne, and clustering effects in 20,21 Ne. On the neutron-rich side the transition to the island of inversion plays an important role, with the radii in the upper part of the sd shell confirming the weakening of the N = 20 magic number. The results add new information to the radii systematics of light nuclei where data are scarce because of the small contribution of nuclear-size effects to the isotope shifts which are dominated by the finite-mass effect.

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Section: Theoretical Modelsmentioning

confidence: 96%

Section: Theoretical Modelsmentioning

confidence: 99%

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Charge radii of neon isotopes across thesdneutron shell

et al. 2011

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“…The ground state properties of carbon isotopes have been studied extensively with the axially deformed RMF [73][74][75] and SHF models [76] and the triaxially deformed SHF model [77]. Here we generalize the RMF calculations by considering two additional degrees of freedom: the triaxial degree of freedom for nuclear shape and the hyperon degree of freedom.…”

Section: B Carbon Hypernucleimentioning

confidence: 99%

Quadrupole deformation(β,γ)of lightΛhypernuclei in a constrained relativistic mean field model: Shape evolution and shape polarization effect of the
Lü
¹
,
Zhao
²
,
Zhou
³

2011
Phys. Rev. C

117

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Quadrupole deformation (β, γ) of light Λ hypernuclei in constrained relativistic mean field model: shape evolution and shape polarization effect of Λ hyperon The shapes of light normal nuclei and Λ hypernuclei are investigated in the (β, γ) deformation plane by using a newly developed constrained relativistic mean field (RMF) model. As examples, the results of some C, Mg, and Si nuclei are presented and discussed in details. We found that for normal nuclei the present RMF calculations and previous Skyrme-Hartree-Fock models predict similar trends of the shape evolution with the neutron number increasing. But some quantitative aspects from these two approaches, such as the depth of the minimum and the softness in the γ direction, differ a lot for several nuclei. For Λ hypernuclei, in most cases, the addition of a Λ hyperon alters slightly the location of the ground state minimum towards the direction of smaller β and softer γ in the potential energy surface E ∼ (β, γ). There are three exceptions, namely, 13 Λ C, 23 Λ C, and 31 Λ Si in which the polarization effect of the additional Λ is so strong that the shapes of these three hypernuclei are drastically different from their corresponding core nuclei.

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“…For each nucleus the strength of the pairing force is fitted by taking care of the empirical data for the pairing gaps, as done in Refs. [94,95,96]. The parameter sets of Ref.…”

Section: Deformationmentioning

confidence: 99%

Tensor interaction in mean-field and density functional theory approaches to nuclear structure

Sagawa

Colò

2014

Progress in Particle and Nuclear Physics

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The importance of the tensor force for nuclear structure has been recognized long ago. Recently, the interest for this topic has been revived by the study of the evolution of nuclear properties far from the stability line. However, in the context of the effective theories that describe medium-heavy nuclei, the role of the tensor force is still debated. This review focuses on ground-state properties like masses and deformation, on single-particle states, and on excited vibrational and rotational modes. The goal is to assess which properties, if any, can bring clear signatures of the tensor force within the mean-field or density functional theory framework. It will be concluded that, while evidences for a clear neutron-proton tensor force exist despite quantitative uncertainties, the role of the tensor force among equal particles is less well established.

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Deformations and electromagnetic moments in carbon and neon isotopes

Cited by 110 publications

References 37 publications

Charge radii of neon isotopes across thesdneutron shell

Charge radii of neon isotopes across thesdneutron shell

Quadrupole deformation(β,γ)of lightΛhypernuclei in a constrained relativistic mean field model: Shape evolution and shape polarization effect of the
Lü
¹
,
Zhao
²
,
Zhou
³

2011
Phys. Rev. C

Tensor interaction in mean-field and density functional theory approaches to nuclear structure

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Deformations and electromagnetic moments in carbon and neon isotopes

Cited by 110 publications

References 37 publications

Charge radii of neon isotopes across thesdneutron shell

Charge radii of neon isotopes across thesdneutron shell

Quadrupole deformation(β,γ)of lightΛhypernuclei in a constrained relativistic mean field model: Shape evolution and shape polarization effect of theLü1, Zhao2, Zhou3 2011Phys. Rev. C

Tensor interaction in mean-field and density functional theory approaches to nuclear structure

Contact Info

Product

Resources

About

Quadrupole deformation(β,γ)of lightΛhypernuclei in a constrained relativistic mean field model: Shape evolution and shape polarization effect of the
Lü
¹
,
Zhao
²
,
Zhou
³

2011
Phys. Rev. C