Strongly Excited0+States Observed in (p,t) Reactions on Gadolinium Nuclei

A single low-lying $0^{+}$state is observed with about 15% of the ground-state strength in the reactions ${}_{}{}^{160,158,156}{}_{}{}^{}\mathrm{Gd}\mathrm{}(p,t)\mathrm{}{}_{}{}^{158,156,154}{}_{}{}^{}\mathrm{Gd}$ at 18 MeV. The change in shape at $N=88\mathrm{}$ is observed in the reaction ${}_{}{}^{154}{}_{}{}^{}\mathrm{Gd}\mathrm{}(p,t)\mathrm{}{}_{}{}^{152}{}_{}{}^{}\mathrm{Gd}$, with two excited $0^{+}$ states being strongly populated. A similar change in the Sm nuclei has been observed earlier. An excited $0^{+}$ state is observed in the reaction ${}_{}{}^{152}{}_{}{}^{}\mathrm{Gd}\mathrm{}(p,t)\mathrm{}{}_{}{}^{150}{}_{}{}^{}\mathrm{Gd}$ with ∼10% of the ground-state strengths.