Shrunk halo and quenched shell gap at $N=16$ in ${}^{22}$C: Inversion of $sd$ states and deformation effects

Abstract

We investigate the ground state properties of ${}^{22}$C by using a deformed relativistic Hartree-Bogoliubov model in continuum and explore the interplays among the formation of a halo, deformation effects, the inversion of $sd$ states, the shell evolution, and changes of nuclear magicities. It is revealed that there is an inversion between the two spherical orbitals $2s_{1/2}$ and $1d_{5/2}$ in ${}^{22}$C compared with the conventional single particle shell structure in stable nuclei. This inversion, together with deformation effects, results in a shrunk halo and a quenched shell gap at $N=16$. It is predicted that the core of ${}^{22}$C is oblate but the halo is prolate. Therefore several exotic nuclear phenomena, including the halo, the shape decoupling effects, the inversion of $sd$ states, and the evolution of shell structure which results in (dis)appearance of magic numbers, coexist in one single nucleus ${}^{22}\mathrm{C}$.

arXiv commentPhys. Lett. B, in press

References in corpus (44)

• Relativistic Continuum Hartree Bogoliubov Theory for Ground State Properties of Exotic Nuclei
• Nuclear magic numbers: new features far from stability
• New parametrization for the nuclear covariant energy density functional with point-coupling interaction
• Magic numbers in exotic nuclei and spin-isospin properties of {\it NN} interaction
• Mean-field description of ground-state properties of drip-line nuclei: Pairing and continuum effects
• Relativistic Nuclear Energy Density Functionals: Mean-Field and Beyond
• Evolution of shell structure in exotic nuclei
• New effective interactions in RMF theory with non-linear terms and density-dependent meson-nucleon coupling
• A Giant Halo at the Neutron Drip Line
• Hidden pseudospin and spin symmetries and their origins in atomic nuclei
• Neutron halo in deformed nuclei
• Spherical Relativistic Hartree theory in a Woods-Saxon basis
• Halos in medium-heavy and heavy nuclei with covariant density functional theory in continuum
• Deformed relativistic Hartree Bogoliubov theory in continuum
• Effective field theory description of halo nuclei
• Reaction cross sections of carbon isotopes incident on a proton
• Direct mass measurements of 19B, 22C, 29F, 31Ne, 34Na and other light exotic nuclei
• ${}^{22}$C: $S$-Wave Two-Neutron Halo
• Nuclear halo structure and pseudo-spin symmetry
• One- and two-neutron removal reactions from the most neutron-rich carbon isotopes
• Halos and related structures
• Deformed nuclear halos
• Augmented Lagrangian Method for Constrained Nuclear Density Functional Theory
• The proton and neutron distribution in Na isotopes: the development of halo and shell structure
• Implications of a matter-radius measurement for the structure of Carbon-22
• Odd systems in deformed relativistic Hartree Bogoliubov theory in continuum
• Density-dependent deformed relativistic Hartree-Bogoliubov theory in continuum
• Shell-model calculations for neutron-rich carbon isotopes with a chiral nucleon-nucleon potential
• Neutral $s$ States in Loosely Bound Nuclei
• Examination of the ${}^{22}$C radius determination with interaction cross sections
• Application of Gaussian expansion method to nuclear mean-field calculations with deformation
• Intertwined effects of pairing and deformation on neutron halos in magnesium isotopes
• Evidence for Z=6 `magic number' in neutron-rich carbon isotopes
• Charge form factors of two-neutron halo nuclei in halo EFT
• Emergent Soft Monopole Modes in Weakly-Bound Deformed Nuclei
• Evolution of Surface Deformations of Weakly-Bound Nuclei in the Continuum
• Descriptions of Carbon isotopes within relativistic Hartree-Fock-Bogoliubov theory
• Probing Surface Quantum Flows in Deformed Pygmy Dipole Modes
• Interplay between the 0+_2 resonance and the nonresonant continuum of the drip-line two-neutron halo nucleus 22C
• Intermediate energy four-body breakup calculations for 22C
• Mean-field analysis of ground state and low-lying electric dipole strength in ${}^{22}$C
• Coulomb breakup of 22C in a four-body model
• Core momentum distribution in two-neutron halo nuclei
• Three-body systems in physics of cold atoms and halo nuclei

Cited by in corpus (50)

• Deformed relativistic Hartree-Bogoliubov theory in continuum with point coupling functional: examples of even-even Nd isotopes
• Quasi-free Neutron Knockout Reaction Reveals a Small $s$-orbital Component in the Borromean Nucleus ${}^{17}$B
• Nuclear mass table in deformed relativistic Hartree-Bogoliubov theory in continuum, II: Even-$Z$ nuclei
• Study of ground state properties of carbon isotopes with deformed relativistic Hartree-Bogoliubov theory in continuum
• Predictive power for superheavy nuclear mass and possible stability beyond the neutron drip line in deformed relativistic Hartree-Bogoliubov theory in continuum
• Deformed relativistic Hartree-Bogoliubov theory in continuum with a point-coupling functional. II. Examples of odd Nd isotopes
• Rotating deformed halo nuclei and shape decoupling effects
• Effects of pairing, continuum, and deformation on particles in the classically forbidden regions for Mg isotopes
• Collapse of the $N=28$ shell closure in the newly discovered ${}^{39}$Na and the development of deformed halos towards the neutron dripline
• Possible bound nuclei beyond the two-neutron drip line in the $50⩽Z⩽70$ region
• Ab initio Gamow in-medium similarity renormalization group with resonance and continuum
• Missed prediction of the neutron halo in ${}^{37}$Mg
• Neutron drip line in the deformed relativistic Hartree-Bogoliubov theory in continuum: Oxygen to Calcium
• Shape coexistence and neutron skin thickness of Pb isotopes by the deformed relativistic Hartree-Bogoliubov theory in continuum
• Ground state properties and potential energy surfaces of ${}^{270}$Hs from multidimensionally-constrained relativistic mean field model
• Angular momentum projection in the deformed relativistic Hartree-Bogoliubov theory in continuum
• Optimized Dirac Woods-Saxon basis for covariant density functional theory
• Green's function method for the single-particle resonances in a deformed Dirac equation
• Bubble nuclei with shape coexistence in even-even isotopes of Hf to Hg
• Multipole expansion of densities in the deformed relativistic Hartree-Bogoliubov theory in continuum
• Possible existence of bound nuclei beyond neutron drip lines driven by deformation
• Relativistic Hartree-Fock-Bogoliubov model for axially deformed nuclei
• Odd-even shape staggering and kink structure of charge radii of Hg isotopes by the deformed relativistic Hartree-Bogoliubov theory in continuum
• An efficient solution for Dirac equation in 3D lattice space with the conjugate gradient method
• Green's function method for the spin and pseudospin symmetries in the single-particle resonant states
• Examination of the evidence for a proton halo in ${}^{22}$Al
• A new approach for deducing rms proton radii from charge-changing reactions of neutron-rich nuclei and the reaction-target dependence
• Microscopic study of higher-order deformation effects on the ground states of superheavy nuclei around ${}^{270}$Hs
• Improved description of nuclear charge radii: Global trends beyond $N=28$ shell closure
• Searching for single-particle resonances with the Green's function method
• Continuum Skyrme-Hartree-Fock-Bogoliubov theory with Green's function method for odd-$A$ nuclei
• Charge radii of potassium isotopes in the RMF(BCS)* approach
• Study of single-particle resonant states with Green's function method
• Accuracy of the mean-field theory in describing ground-state properties of light nuclei
• Spectroscopic factors of resonance states with the Gamow shell model
• Two-neutron correlations in a Borromean ${}^{20}\mathrm{C}+n+n$ system: Sensitivity of unbound subsystems
• Unified mechanism behind the even-parity ground state and neutron halo of ${}^{11}$Be
• Evolution of nuclear charge radii in copper and indium isotopes
• Symmetry Energy from Two-Nucleon Separation Energies of Pb and Ca Isotopes
• Nuclear shape evolution of neutron-deficient Au and kink structure of Pb isotopes
• Triaxial relativistic Hartree-Bogoliubov theory in continuum for exotic nuclei
• Restoration of pseudo-spin symmetry in $N=32$ and $34$ isotones described by relativistic Hartree-Fock theory
• Ground-state properties and structure evolutions of odd-$A$ transuranium Bk isotopes from deformed relativistic Hartree-Bogoliubov theory in continuum
• Dipole response in deformed halo nuclei ${}^{42}\mathrm{Mg}$ and ${}^{44}\mathrm{Mg}$
• Implication of shell quenching in scandium isotopes around N=20
• Resonances of unbound quantum many-body systems of nuclei
• Nuclear Pairing Energy vs Mean Field Energy: Do They Talk To Each Other For Searching The Energy Minimum?
• Exploratory study on the masses of odd-$Z$ nuclei and $r$-process simulation based on the deformed relativistic Hartree-Bogoliubov theory in continuum
• Models for Pairing Phenomena
• Implication of odd-even staggering in the charge radii of calcium isotopes