Abstract
Lifetimes of excited states of $^{157}\mathrm{Dy}$ were measured by recoil distance Doppler-shift (RDDS) and Doppler-shift attenuation (DSAM) methods. The $\ensuremath{\gamma}$-ray coincidence data were analyzed by the differential decay curve method. The level scheme and the newly deduced transition strengths were simultaneously described in the framework of the particle plus triaxial rotor model (PTRM) and the rigid-rotor model.
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