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

2014/10/03 by G. R. Jansen, G. R. Jansen, J. Engel +4 · 8 citations
Physics and Astronomy · Chemistry · #Nuclear physics research studies #Advanced NMR Techniques and Applications #Advanced Chemical Physics Studies

paper · doi:10.1103/physrevlett.113.142502

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 (22,24)O, and a weaker N=14 shell closure in (20)C. 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.

Citations

• Medium-Mass Nuclei with Normal-Ordered Chiral N N + 3 N Interactions
• Isotopic Chains Around Oxygen from Evolved Chiral Two- and Three-Nucleon Interactions
• Evolution of Shell Structure in Neutron-Rich Calcium Isotopes
• Three-Body Forces and the Limit of Oxygen Isotopes
• Continuum Effects and Three-Nucleon Forces in Neutron-Rich Oxygen Isotopes

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• Accurate prediction of Gamow-Teller beta-decay matrix elements via machine learning: implications for nuclear structure
• Many-body perturbation theories for finite nuclei
• Quasiparticle pairing encoding of atomic nuclei for quantum annealing
• The role of three-nucleon potentials within the shell model: Past and present

Related

• From closed shells to open shells: Coupled-cluster calculations of atomic nuclei
• Recent advances in coupled cluster computations of open-shell atomic nuclei
• Ab Initio Calculations of the Carbon and Oxygen Isotopes: Energies, Correlations, and Superfluid Pairing
• Continuum Effects and Three-Nucleon Forces in Neutron-Rich Oxygen Isotopes
• Structure and dynamics of open-shell nuclei from spherical coupled-cluster theory