A density-tail repair method yields converged matter and charge radii for 4,6,8He and 6,7,8Li from Jacobi no-core shell model calculations with chiral forces.
Charge radii and neutron correlations in helium halo nuclei
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abstract
Within the complex-energy configuration interaction framework, we study correlations of valence neutrons to explain the behavior of charge radii in the neutron halo nuclei $^{6,8}$He. We find that the experimentally observed decrease of the charge radius between $^6$He and $^8$He is caused by a subtle interplay between three effects: dineutron correlations, a spin-orbit contribution to the charge radius, and a core swelling effect. We demonstrate that two-neutron angular correlations in the $2^+_1$ resonance of $^6$He differ markedly from the ground-state correlations in $^{6,8}$He.
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Radii of light nuclei from the Jacobi No-Core Shell Model
A density-tail repair method yields converged matter and charge radii for 4,6,8He and 6,7,8Li from Jacobi no-core shell model calculations with chiral forces.