Differential quadrupole moment measurements of the ${1/2}^{+}\left[660\right]\hspace{0.5em}{(i}_{13/2})$ neutron intruder band in ${}^{133}\mathrm{Nd}$ and ${}^{135}\mathrm{Nd}$

Quadrupole moment measurements of the ${1/2}^{+}\left[660\right]\hspace{0.5em}{(i}_{13/2})$ bands in ${}^{133}\mathrm{Nd}\hspace{0.5em}\mathrm{}(N=73\mathrm{})\mathrm{}$ and ${}^{135}\mathrm{Nd}\hspace{0.5em}\mathrm{}(N=75\mathrm{})\mathrm{}$ were performed using the Doppler-shift attenuation method. These results, coupled with the previously measured $Q_0$ for the same configuration in ${}^{137}\mathrm{Nd}\hspace{0.5em}\mathrm{}(N=77\mathrm{})\mathrm{}$, clearly demonstrate a trend of decreasing quadrupole deformation with increasing neutron number. The larger quadrupole moment in ${}^{133}\mathrm{Nd}$ compared with that in ${}^{135}\mathrm{Nd}$ and ${}^{137}\mathrm{Nd}$ offers evidence for the role played by the large shell gap at $N=72\mathrm{}$ for ${\beta }_2\sim 0.35–0.40$ in stabilizing the shape at enhanced deformation. The comparison of results from gating below and above the level of interest provides information on the time scale of the sidefeeding contributions to highly deformed structures in the $A\sim 130$ region.