Different deformations of proton and neutron distributions in nuclei

Different collective deformation coordinates for neutrons and protons are introduced to allow for both stretching and $\gamma$ transitions consistent with experiments. The rotational actinide nuclei ${}_{}{}^{234-238}{}_{}{}^{}\mathrm{U}$ and ${}_{}{}^{232}{}_{}{}^{}\mathrm{Th}$ are successfully analyzed in this model.

NUCLEAR STRUCTURE ${}_{}{}^{232}{}_{}{}^{}\mathrm{Th}$, ${}_{}{}^{234-238}{}_{}{}^{}\mathrm{U}$ calculated $B$ ($E2\mathrm{}$) values, collective model.