Coulomb core polarization in 48Ca creates intrinsic proton admixture in the neutron skin that enhances the effective neutron distribution by 0.052 fm for thin-skin values matching CREX, with the impurity suppressed at larger thicknesses.
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Constraining neutron skin impurity in $^{48}\mathrm{Ca}$ and its relevance for the CREX-PREX puzzle
Coulomb core polarization in 48Ca creates intrinsic proton admixture in the neutron skin that enhances the effective neutron distribution by 0.052 fm for thin-skin values matching CREX, with the impurity suppressed at larger thicknesses.