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The PREX group reported a new skin value, $r_{\rm skin}^{208}({\rm PREX2}) =0.283 \pm 0.071{\rm fm}$. Using the chiral (Kyushu) $g$-matrix folding modelwith the proton and neutron densities determined with D1S+GHFB+AMP, wedetermined neutron skin thickness $r_{\rm skin}^{208}({\rm exp})$ from reactioncross sections $\sigma_{\rm R}({\rm exp})$ of p+$^{208}$Pb scattering. Themethod also yielded $r_{\rm skin}^{208}({\rm exp})$ from $\sigma_{\rm R}({\rmexp})$ of $^{4}$He+$^{208}$Pb scattering. We accumulated the 206 EoSs anddetermined a sloop parameter from the 206 EoSs. The value yields $r_{\rmskin}^{208}=0.102 \sim 0.354~{\rm fm}$. As the first aim, we first determine$r_{\rm skin}^{208}({\rm exp})$ from $\sigma_{\rm R}({\rm exp})$ of $^{3}$Hescattering on $^{208}$Pb target and take the weighted mean and its error for$r_{\rm skin}^{208}({\rm PREX2})$, three skin values of p+$^{208}$Pb, $^{3,4}$He+$^{208}$Pb scattering and the $r_{\rm skin}^{208}$ based on the 206 EoSs.As the second aim, we determine matter radii $r_{m}({\rm exp})$ of$^{58,60,64}$Ni from $\sigma_{\rm R}({\rm exp})$ of $^{3,4}$He scattering on$^{58,60,64}$Ni targets. Our result is $r_{\rm skin}^{208}({\rm exp}) =0.512\pm 0.268~{\rm fm}$ for $^{3}$He+$^{208}$Pb scattering. Our conclusion is$r_{\rm skin}^{208} =0.285 \pm 0.030~{\rm fm}$. It is determined from the 5skin values mentioned above.

Skin values and matter radii of $^{208}$Pb and $^{58,60,64}$Ni based on reaction cross section of $^{3,4}$He scattering