Dispersive-optical-model analysis of the asymmetry dependence of neutron skins

Document Type

Journal Article

Role

Author

Published In

Physical Review C

Volume

114

Article Number

044316

Publication Date

10-13-2026

Abstract

New dispersive-optical-model analyses of 54Fe and 90Zr together with updated results for 40Ca and 48Ca and the earlier result for 208Pb shed light on the behavior of neutron skins in nuclei. Starting with a negative skin for 40Ca, a trend increasing somewhat stronger than linear emerges when the neutron skin of these nuclei is considered as a function of asymmetry, (π‘βˆ’π‘)/𝐴, and linked to the Green's function Monte Carlo results for asymmetric He nuclei. This general trend is consistent with the expectation that nuclei near the neutron drip line are expected to have very large neutron skins. The present analysis therefore motivates the question of which nuclei provide the most relevant link to neutron star physics.

Keywords

Neutron skin thickness Nuclear charge distribution Nuclear radii 190 ≀ A ≀ 219 39 ≀ A ≀ 58 90 ≀ A ≀ 149 Nuclear many-body theory Optical, coupled-channel & distorted wave models


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