Abstract
We compute the charge radii and ground-state energies of even-mass neon and magnesium isotopes from neutron number N=8 to the dripline. Our calculations are based on nucleon-nucleon and three-nucleon potentials from chiral effective field theory that include Δ isobars. These potentials yield an accurate saturation point and symmetry energy of nuclear matter. We use the coupled-cluster method and start from an axially symmetric reference state. Binding energies and two-neutron separation energies largely agree with data, and the dripline in neon is accurate. The computed charge radii are accurate for many isotopes where data exist. Finer details, such as isotope shifts, however, are not accurately reproduced. These chiral potentials indicate a subshell closure at N=14 for the radii (but not for two-neutron separation energies) and a decrease in charge radii at N=8 (observed in neon and predicted for magnesium). They yield a continued increase of charge radii as neutrons are added beyond N=14 yet underestimate the large increase at N=20 in magnesium.
Original language | English |
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Article number | 051303 |
Journal | Physical Review C |
Volume | 102 |
Issue number | 5 |
DOIs | |
State | Published - Nov 20 2020 |
Funding
Acknowledgments. We thank T. Duguet, Z. H. Sun, and A. Tichai for useful discussions. This work was supported by the U.S. Department of Energy, Office of Science, Office of Nuclear Physics, under Awards No. DE-FG02-96ER40963 and No. DE-SC0018223. Computer time was provided by the Innovative and Novel Computational Impact on Theory and Experiment (INCITE) Program. This research used resources of the Oak Ridge Leadership Computing Facility located at Oak Ridge National Laboratory, which is supported by the Office of Science of the Department of Energy under Contract No. DE-AC05-00OR22725.
Funders | Funder number |
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Office of Science of the Department of Energy | DE-AC05-00OR22725 |
U.S. Department of Energy | |
Office of Science | |
Nuclear Physics | DE-FG02-96ER40963, DE-SC0018223 |
Oak Ridge National Laboratory |