The \(\alpha\) -nucleus interaction is crucial in the description of \(\alpha\) decay. Recently, we developed a pocket-type dynamical double-folding potential (DDFP) that effectively incorporates both the surface-medium effect and interior Pauli repulsion in \(\alpha\) decay [H. Zheng et al., Phys. Rev. C 109, L011301 (2024)]. This potential results in a pocket geometry within the nuclear surface region, which is consistent with the \(\alpha\) -clustering characteristics predicted by microscopic calculations. In this study, the accuracy of the pocket-type DDFP was validated via systematic calculations of \(\alpha\) -decay half-lives and an extended evaluation of the nuclear charge radii of the daughter nuclei. The results demonstrate good agreement with the experimental data for both quantities, thereby confirming the reliability of the DDFP model. Compared with calculations that use \(\alpha\) -nucleus interactions derived from conventional double-folding procedures, DDFP employs fewer adjustable parameters to achieve a more accurate description of the charge radii based on the experimental \(\alpha\) -decay energies.
