Abstract
The authors provide a systematic global study of differential charge radii of nuclei within covariant density functional theory. They present results for chains of isotopes as they cross major closed neutron shell numbers, where there is usually a change of slope (kink) in the charge radii. The odd-even staggering of charge radii is also investigated, and particle-vibration coupling in odd-mass nuclei is suggested to play a significant role in addition to pairing. This detailed study lays a solid foundation to assess how various forms of interactions within the nuclear many-body system affect fundamental nuclear properties such as nuclear radii and how they evolve with nucleon number.
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