Yrast isomers in tin nuclei from heavy ion collisions and the νh11/2subshell filling

Long-lived ${10}^{+}$ isomers in ${}_{}{}^{122}{}_{}{}^{}\mathrm{Sn}$ and ${}_{}{}^{124}{}_{}{}^{}\mathrm{Sn}$ have been identified among the products of ${}_{}{}^{124}{}_{}{}^{}\mathrm{Sn}$+325 MeV ${}_{}{}^{76}{}_{}{}^{}\mathrm{Ge}$ collisions. The measurements virtually complete a series of B(E2) determinations for (ν${\mathit{h}}_{11/2}$ ${)}^{\mathit{n}}$ states in ${}_{}{}^{116\mathrm{-}130}{}_{}{}^{}\mathrm{Sn}$, which pinpoint half filling of the ν${\mathit{h}}_{11/2}$ subshell very close to N=73. Results for these Z=50 isotopes and for the N=82 isotones are contrasted, and an enlightening comparison between the effective E2 charges observec in tin and lead isotopes is developed.