Charge radii of exotic neon and magnesium isotopes

Novario, Samuel J.; Hagen, Gaute; Jansen, Gustav R.; Papenbrock, T.

doi:10.1103/physrevc.102.051303

Title: Charge radii of exotic neon and magnesium isotopes

Journal Article · Fri Nov 20 00:00:00 EST 2020 · Physical Review. C

DOI:https://doi.org/10.1103/physrevc.102.051303· OSTI ID:1719118

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Univ. of Tennessee, Knoxville, TN (United States); Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States); Univ. of Tennessee, Knoxville, TN (United States)
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)

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.

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Research Organization:: Univ. of Tennessee, Knoxville, TN (United States); Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)

Sponsoring Organization:: USDOE Office of Science (SC), Nuclear Physics (NP)

Grant/Contract Number:: FG02-96ER40963; AC05-00OR22725

OSTI ID:: 1719118

Alternate ID(s):: OSTI ID: 1731053

Journal Information:: Physical Review. C, Vol. 102, Issue 5; ISSN 2469-9985

Publisher:: American Physical Society (APS)Copyright Statement

Country of Publication:: United States

Language:: English

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Coupled-cluster calculations of neutrinoless double-beta decay in $^{48}$Ca Novario, S. J.; Gysbers, P.; Engel, J. arXiv https://doi.org/10.48550/arxiv.2008.09696	text	January 2020
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Ab initio computation of the longitudinal response function in $^{40}$Ca Sobczyk, J. E.; Acharya, B.; Bacca, S. arXiv https://doi.org/10.48550/arxiv.2103.06786	text	January 2021

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Title: Charge radii of exotic neon and magnesium isotopes

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