Neutron-rich calcium isotopes within realistic Gamow shell model calculations with continuum coupling

Abstract

Based on the realistic nuclear force of the high-precision CD-Bonn potential, we have performed comprehensive calculations for neutron-rich calcium isotopes using the Gamow shell model (GSM) which includes resonance and continuum. The realistic GSM calculations produce well binding energies, one- and two-neutron separation energies, predicting that ${}^{57}$Ca is the heaviest bound odd isotope and ${}^{70}$Ca is the dripline nucleus. Resonant states are predicted, which provides useful information for future experiments on particle emissions in neutron-rich calcium isotopes. Shell evolutions in the calcium chain around neutron numbers \textit{N} = 32, 34 and 40 are understood by calculating effective single-particle energies, the excitation energies of the first $2^{+}$ states and two-neutron separation energies. The calculations support shell closures at ${}^{52}$Ca (\textit{N} = 32) and ${}^{54}$Ca (\textit{N} = 34) but show a weakening of shell closure at ${}^{60}$Ca (\textit{N} = 40). The possible shell closure at ${}^{70}$Ca (\textit{N} = 50) is predicted.

arXiv comment24 pages, 6 figures

References in corpus (38)

• The high-precision, charge-dependent Bonn nucleon-nucleon potential (CD-Bonn)
• Chiral effective field theory and nuclear forces
• Accurate Charge-Dependent Nucleon-Nucleon Potential at Fourth Order of Chiral Perturbation Theory
• Magic numbers in exotic nuclei and spin-isospin properties of {\it NN} interaction
• Model-independent low momentum nucleon interaction from phase shift equivalence
• Shell model study of the isobaric chains A=50, A=51 and A=52
• Gamow Shell Model Description of Neutron-Rich Nuclei
• Evolution of shell structure in neutron-rich calcium isotopes
• A nucleus-dependent valence-space approach to nuclear structure
• Shell Model in the Complex Energy Plane
• Leading chiral three-nucleon forces along isotope chains in the calcium region
• Decay of neutron-rich Mn nuclides and deformation of heavy Fe isotopes
• Two-Particle Resonant States in a Many-Body Mean Field
• Gamow Shell Model Description of Weakly Bound Nuclei and Unbound Nuclear States
• Neutron drip line in the Ca region from Bayesian model averaging
• Ab Initio Multi-Reference In-Medium Similarity Renormalization Group Calculations of Even Calcium and Nickel Isotopes
• Cross-shell excitation in two-proton knockout: Structure of ${}^{52}$Ca
• Quadrupole Pairing Interaction and Signature Inversion
• Observation of isotonic symmetry for enhanced quadrupole collectivity in neutron-rich 62,64,66Fe isotopes at N=40
• Ab-initio No-Core Gamow Shell Model calculations with realistic interactions
• Effective shell-model hamiltonians from realistic nucleon-nucleon potentials within a perturbative approach
• Three-nucleon forces and spectroscopy of neutron-rich calcium isotopes
• Gamow shell model and realistic nucleon-nucleon interactions
• Emergent properties of nuclei from ab initio coupled-cluster calculations
• Quantified Gamow Shell Model interaction for $psd$-shell nuclei
• Living on the edge of stability, the limits of the nuclear landscape
• Ab-initio no-core Gamow shell model calculations of multi-neutron systems
• Ground-state properties of closed-shell nuclei with low-momentum realistic interactions
• Continuum effects in neutron-drip-line oxygen isotopes
• Nuclear Structure Towards N=40 60Ca: In-beam gamma-ray Spectroscopy of 58,60Ti
• Realistic shell-model calculations for isotopic chains "north-east'' of 48Ca in the (N,Z) plane
• Two-neutron halo structure of ${}^{31}$F
• Study of neutron-rich calcium isotopes with a realistic shell-model interaction
• Gamow shell-model calculations of drip-line oxygen isotopes
• Description of proton-rich nuclei in the $A\sim 20$ region with the Gamow shell model
• Neutron Dripline in Odd and Even Mass Calcium and Nickel Nuclei
• Octupole strength in the neutron-rich calcium isotopes
• Recursion Method for Deriving Energy-Independent Effective Interaction

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• Complex valence-space effective operators for observables: the Gamow-Teller transition
• Investigating nuclear structure near $N=32$ and $N=34$: Precision mass measurements of neutron-rich Ca, Ti and V isotopes
• Shell-model study of titanium isotopic chain with chiral two- and three-body forces
• Revisiting the variational two-particle reduced density matrix for nuclear systems
• Large scale shell model calculation for collectivity in nuclei beyond 78Ni
• Estimate of the location of the neutron drip line for calcium isotopes from an exact Hamiltonian with continuum pair correlations