Blocking effect in the ${16}^{+}$→${16}^{+}$ (p,t) transition on the isomeric ${}_{}{}^{178}{}_{}{}^{}\mathrm{Hf}_{}^{\mathit{m}2}{}_{}{}^{}$ target

The availability of a target of ${}_{}{}^{178}{}_{}{}^{}\mathrm{Hf}$ in its aligned four-quasiparticle, ${\mathit{J}}^{\mathrm{\pi }}$=${16}^{+}$ isomeric state, has allowed to measure the effect of blocking of the aligned-quasineutron orbitals in the (p,t) reaction. The experimental ratio of cross sections R=${\mathrm{\sigma }}_{(16\mathrm{}}^{+}$→${16}^{+}$)/${\mathrm{\sigma }}_{(0\mathrm{}}^{+}$→$0^{+}$) agrees with a predicted value deduced from the known (p,t) cross section on odd Hf isotopes.