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How chiral forces shape neutron-rich Ne and Mg nuclei

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arxiv 2305.06955 v1 pith:WYD2TMQQ submitted 2023-05-11 nucl-th nucl-ex

classification nucl-thnucl-ex
keywords chiralground-statenucleishapeagreeanalysisbandbands
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abstract

We compute the structure of the exotic even nuclei $^{20-34}$Ne and $^{34-40}$Mg using interactions from chiral effective field theory (EFT). Our results for the ground-state rotational bands in $^{20-32}$Ne and $^{36-40}$Mg agree with data. We predict a well-deformed $^{34}$Ne and find that $^{40}$Mg 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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  1. The southern shore of the island of inversion studied via quasi-free scattering

    nucl-ex 2024-12 unverdicted

    Reviews quasi-free scattering data that place 28F, 30F, 27O and 28O inside the island of inversion and find signs of superfluidity and a possible 29F halo.

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