Abstract
The change of proton and neutron skin thicknesses is investigated in nuclei after \ensuremath{\alpha} decay. The skin thicknesses are self-consistently calculated. The observed \ensuremath{\alpha} decays lead to relatively large decrease of the proton skin in the daughter nuclei. A large increase of the neutron skin in the daughter nucleus reflects the hindered \ensuremath{\alpha} decay. This hindrance is related to the decrease of both the ${Q}_{\ensuremath{\alpha}}$ value and the preformation probability in the parent nucleus. For each isotopic chain, the observed half-lives consistently correlate with the change of the proton (neutron) skin thickness, from parent to daughter nuclei.
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