Medium-mass nuclei from chiral nucleon-nucleon interactions

Abstract

We compute the binding energies, radii, and densities for selected medium-mass nuclei within coupled-cluster theory and employ the "bare" chiral nucleon-nucleon interaction at order N3LO. We find rather well-converged results in model spaces consisting of 15 oscillator shells, and the doubly magic nuclei 40Ca, 48Ca, and the exotic 48Ni are underbound by about 1 MeV per nucleon within the CCSD approximation. The binding-energy difference between the mirror nuclei 48Ca and 48Ni is close to theoretical mass table evaluations. Our computation of the one-body density matrices and the corresponding natural orbitals and occupation numbers provides a first step to a microscopic foundation of the nuclear shell model.

5 pages, 5 figures

References in corpus (4)

• Structure of A=10-13 nuclei with two- plus three-nucleon interactions from chiral effective field theory
• Coupled-cluster theory for three-body Hamiltonians
• Benchmark calculations for 3H, 4He, 16O and 40Ca with ab-initio coupled-cluster theory
• Auxiliary Field Diffusion Monte Carlo calculation of nuclei with A<40 with tensor interactions

Cited by in corpus (5)

• Recent developments in no-core shell-model calculations
• Importance Truncation for Large-Scale Configuration Interaction Approaches
• Solution of the center-of-mass problem in nuclear structure calculations
• Ab-initio computation of neutron-rich oxygen isotopes
• Quasiparticle and quasihole states of nuclei around 56Ni