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Title: Emergent properties of nuclei from ab initio coupled-cluster calculations

Journal Article · · Physica Scripta
 [1];  [2];  [3];  [1]
  1. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States); Univ. of Tennessee, Knoxville, TN (United States)
  2. Michigan State Univ., East Lansing, MI (United States); Univ. of Oslo (Norway)
  3. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)

Emergent properties such as nuclear saturation and deformation, and the effects on shell structure due to the proximity of the scattering continuum and particle decay channels are fascinating phenomena in atomic nuclei. In recent years, ab initio approaches to nuclei have taken the first steps towards tackling the computational challenge of describing these phenomena from Hamiltonians with microscopic degrees of freedom. Our endeavor is now possible due to ideas from effective field theories, novel optimization strategies for nuclear interactions, ab initio methods exhibiting a soft scaling with mass number, and ever-increasing computational power. We review some of the recent accomplishments. We also present new results. The recently optimized chiral interaction NNLO$${}_{{\rm{sat}}}$$ is shown to provide an accurate description of both charge radii and binding energies in selected light- and medium-mass nuclei up to 56Ni. We derive an efficient scheme for including continuum effects in coupled-cluster computations of nuclei based on chiral nucleon–nucleon and three-nucleon forces, and present new results for unbound states in the neutron-rich isotopes of oxygen and calcium. Finally, the coupling to the continuum impacts the energies of the $${J}^{\pi }=1/{2}^{-},3/{2}^{-},7/{2}^{-},3/{2}^{+}$$ states in $${}^{\mathrm{17,23,25}}$$O, and—contrary to naive shell-model expectations—the level ordering of the $${J}^{\pi }=3/{2}^{+},5/{2}^{+},9/{2}^{+}$$ states in $${}^{\mathrm{53,55,61}}$$Ca.

Research Organization:
Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States). Oak Ridge Leadership Computing Facility (OLCF)
Sponsoring Organization:
USDOE Office of Science (SC), Nuclear Physics (NP)
Grant/Contract Number:
AC05-00OR22725; SC0008499; FG02-96ER40963; ERKBP57
OSTI ID:
1286964
Alternate ID(s):
OSTI ID: 1253425
Journal Information:
Physica Scripta, Vol. 91, Issue 6; ISSN 0031-8949
Publisher:
IOP PublishingCopyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 56 works
Citation information provided by
Web of Science

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Cited By (6)

Chiral EFT based nuclear forces: achievements and challenges journal July 2016
Combined few-body and mean-field model for nuclei journal June 2018
Nuclear Structure from the In-Medium Similarity Renormalization Group journal June 2018
From bare interactions, low-energy constants, and unitary gas to nuclear density functionals without free parameters: Application to neutron matter journal May 2017
In-medium similarity renormalization group for closed and open-shell nuclei journal December 2016
Combined few-body and mean-field model for nuclei text January 2018

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