Lifetimes of low-lying levels in the $\Delta I=2\mathrm{}$ band built on the $\pi h_{11/2}$ state in the Z-odd nucleus ${}^{135}\mathrm{Pr}$ were measured with the Doppler-shift recoil-distance technique. Reduced transition probabilities B(E2) were extracted in order to calculate the deformation parameters. These values were compared to theoretical results of the total Routhian surface (TRS) calculations. While the quadrupole moments obtained for the $\pi h_{11/2}$ excited levels below the first backbend in ${}^{135}\mathrm{Pr}$ are very similar to those of the ${}^{134}\mathrm{Ce}$ core, TRS results predict a quadrupole moment of about 50$\%$ larger for the core.

• Received 20 February 1998

DOI:https://doi.org/10.1103/PhysRevC.58.3726