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This analysis demonstrates the kink effect in nuclear charge radii, revealing differences between parameter sets in isotopes.
The kink effect in the nuclear charge radii of lead isotopes is studied using the relativistic mean field approximation with the parameter sets NL3* and NL-Z. It is shown that the small component of the valence neutrons’ Dirac spinors plays an essential role in the formation of the kink, due to its effects on the single-proton central potential in both cases. However, notable differences emerge between the results obtained from these two sets when pairing correlations are not considered.
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Marcos et al. (2025) studied this question.
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