Lifetime measurements of the lower excited states in the yrast band of ${}^{167}\mathrm{Lu}$ have been measured using the recoil distance Doppler shift method. The excited nuclear states in ${}^{167}\mathrm{Lu}$ were populated via ${}^{159}\mathrm{Tb}({}^{12}\mathrm{C},4n)$ fusion-evaporation reaction at a beam energy of 74 MeV. In the experiment, the lifetime of states from ${13/2}^{-}\hslash$ to ${29/2}^{-}\hslash$ spins were obtained. From extracted lifetimes, the reduced transition probabilities $\left[B\right(E2\left)\right]$ and transition quadrupole moments $\left(Q_t\right)$ values have been deduced. The large $\left(Q_t\right)$ values obtained in the experiment indicate high deformation for ${}^{167}\mathrm{Lu}$ near ground state, a typical characteristic of the mass region. The almost constant values of experimental $B\left(E2\right)$ reflects the stability of deformed structure of ${}^{167}\mathrm{Lu}$ nucleus in the yrast configuration. The experimental results are compared with the results of the cranked Hartree-Fock-Bogoliubov model based total Routhian surface (TRS) calculations. The experimental values are in better agreement with the TRS calculations at low frequencies than at high frequencies.

• Received 8 May 2019

DOI:https://doi.org/10.1103/PhysRevC.100.024325