How chiral forces shape neutron-rich Ne and Mg nuclei
Abstract
We compute the structure of the exotic even nuclei 20-34Ne and 34-40Mg using interactions from chiral effective field theory (EFT). Our results for the ground-state rotational bands in 20-32Ne and 36-40Mg agree with data. We predict a well-deformed 34Ne and find that 40Mg exhibits an oblate deformed band close to the prolate ground-state, indicating the emergence of shape co-existence at the neutron dripline. A global sensitivity analysis shows that the subleading singlet S-wave contact and a pion-nucleon coupling strongly impact deformation in chiral EFT.
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