Lifetime measurements in 134Pr and chirality in nuclei

Lifetimes of exited states in Pr-134 were measured be means of the recoil distance Dopplershift and Doppler-shift attenuation techniques. The experiments were performed at IReS, Strasbourg using the EUROBALL IV spectrometer, in conjunction with the inner BCO ball and the Cologne coincidence plunger apparatus. Exited states in Pr-134 were populated in the fusion-evaporation reaction Sn-119(F-19, 4n)Pr-134. Reduced transition probabilities in Pr-134 are compared to the predictions of the two quasiparticle+triaxial rotor and interacting boson fermion-fermion models. The experimental results do not support the presence of static chirality in Pr-134 underlying the importance of shape fluctuations. Only within a dynamical context the presence of intrinsic chirality in Pr-134 can be supported.