# Charge radii and neutron correlations in helium halo nuclei

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.
Document type :
Journal articles

http://hal.in2p3.fr/in2p3-00618511
Contributor : Michel Lion <>
Submitted on : Friday, September 2, 2011 - 8:50:09 AM
Last modification on : Thursday, February 1, 2018 - 1:26:25 AM

### Citation

G. Papadimitriou, A.T. Kruppa, N. Michel, W. Nazarewicz, M. Ploszajczak, et al.. Charge radii and neutron correlations in helium halo nuclei. Physical Review C, American Physical Society, 2011, 84, pp.051304(R). ⟨10.1103/PhysRevC.84.051304⟩. ⟨in2p3-00618511⟩

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