Ab-initio computation of neutron-rich oxygen isotopes

Abstract

We compute the binding energy of neutron-rich oxygen isotopes and employ the coupled-cluster method and chiral nucleon-nucleon interactions at next-to-next-to-next-to-leading order with two different cutoffs. We obtain rather well-converged results in model spaces consisting of up to 21 oscillator shells. For interactions with a momentum cutoff of 500 MeV, we find that 28O is stable with respect to 24O, while calculations with a momentum cutoff of 600 MeV result in a slightly unbound 28O. The theoretical error estimates due to the omission of the three-nucleon forces and the truncation of excitations beyond three-particle-three-hole clusters indicate that the stability of 28O cannot be ruled out from ab-initio calculations, and that three-nucleon forces and continuum effects play the dominant role in deciding this question.

5 pages + eps, 3 figures

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• Continuum effects and three-nucleon forces in neutron-rich oxygen isotopes
• Recent development of complex scaling method for many-body resonances and continua in light nuclei
• Direct mass measurements of 19B, 22C, 29F, 31Ne, 34Na and other light exotic nuclei
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• Towards an ab initio covariant density functional for nuclear structure
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• Extension of coupled-cluster theory with a non-iterative treatment of connected triply excited clusters to three-body Hamiltonians
• Chiral three-nucleon forces and bound excited states in neutron-rich oxygen isotopes
• Fully self-consistent relativistic Brueckner-Hartree-Fock theory for finite nuclei
• Computational Nuclear Quantum Many-Body Problem: The UNEDF Project
• Relativistic Brueckner-Hartree-Fock theory for finite nuclei
• Continuum effects in neutron-drip-line oxygen isotopes
• Trends of Neutron Skins and Radii of Mirror Nuclei from First Principles
• Emergence of the N=16 shell gap in 21O
• Spherical coupled-cluster theory for open-shell nuclei
• Gamow shell-model calculations of drip-line oxygen isotopes
• Multiscale physics of atomic nuclei from first principles
• Nuclear forces from chiral EFT: The unfinished business
• Ab initio computation of circular quantum dots
• Ab initio computations of strongly deformed nuclei around ${}^{80}$Zr
• Ground-state and single-particle energies of nuclei around ^{16}O, ^{40}Ca, and ^{56}Ni from realistic nucleon-nucleon forces
• Computation of spectroscopic factors with the coupled-cluster method
• Emulating \emph{ab initio} computations of infinite nucleonic matter
• Closed-shell properties of ${}^{24}$O with {\em ab initio} coupled-cluster theory
• Uncertainty quantification in electromagnetic observables of nuclei
• Density-matrix formalism with three-body ground-state correlations
• Coupled-cluster theory for strong entanglement in nuclei
• ${}^4$He energies and radii by the coupled-cluster method with many-body average potential
• Many-body interactions and nuclear structure
• Exactness of the normal-ordered two-body truncation of three-nucleon forces
• Formulation of effective interaction in terms of renormalized vertices and propagators
• Introduction - Strong interaction in the nuclear medium: new trends
• Coupled-cluster computations of optical potential for medium-mass nuclei
• From closed shells to open shells: Coupled-cluster calculations of atomic nuclei