Ab Initio Coupled-Cluster Effective Interactions for the Shell Model: Application to Neutron-Rich Oxygen and Carbon Isotopes

G. R. Jansen, J. Engel, G. Hagen, P. Navratil, and A. Signoracci
Phys. Rev. Lett. 113, 142502 – Published 3 October 2014

Abstract

We derive and compute effective valence-space shell-model interactions from ab initio coupled-cluster theory and apply them to open-shell and neutron-rich oxygen and carbon isotopes. Our shell-model interactions are based on nucleon-nucleon and three-nucleon forces from chiral effective-field theory. We compute the energies of ground and low-lying states, and find good agreement with experiment. In particular, our computed 2+ states are consistent with N=14,16 shell closures in O22,24, and a weaker N=14 shell closure in C20. We find good agreement between our coupled-cluster effective-interaction results with those obtained from standard single-reference coupled-cluster calculations for up to eight valence neutrons.

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  • Received 10 February 2014

DOI:https://doi.org/10.1103/PhysRevLett.113.142502

© 2014 American Physical Society

Authors & Affiliations

G. R. Jansen1,2, J. Engel3, G. Hagen1,2, P. Navratil4, and A. Signoracci1,2

  • 1Physics Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, USA
  • 2Department of Physics and Astronomy, University of Tennessee, Knoxville, Tennessee 37996, USA
  • 3Deptartment of Physics and Astronomy, University of North Carolina, Chapel Hill, North Carolina 27516-3255, USA
  • 4TRIUMF, 4004 Wesbrook Mall, Vancouver, British Columbia, V6T 2A3 Canada

See Also

Nonperturbative Shell-Model Interactions from the In-Medium Similarity Renormalization Group

S. K. Bogner, H. Hergert, J. D. Holt, A. Schwenk, S. Binder, A. Calci, J. Langhammer, and R. Roth
Phys. Rev. Lett. 113, 142501 (2014)

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Vol. 113, Iss. 14 — 3 October 2014

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