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Lifetime measurements on fission fragments in the A similar to 100 region
(E D P SCIENCES, 2013) Grente, L.; Salsac, M. -D.; Korten, W.; Goergen, A.; Hagen, T. W.; Braunroth, T.; Farget, F.; Chatillon, A; Farget, F; Faust, H; Fioni, G; Goutte, D; Goutte, H
Lifetimes of first 4(+) and 6(+) states have been measured in neutron-rich isotopes of Zr, Mo, Ru and Pd using the recoil distance Doppler shift method at GANIL. The nuclei were produced through a fusion-fission reaction in inverse kinematics. The fission fragments were fully identified in the large-acceptance VAMOS spectrometer and gamma -rays were detected in coincidence with the EXOGAM germanium array. Lifetimes of excited states in the range of 1-100 ps were measured with the Cologne plunger. Preliminary lifetime results are presented as well as a discussion on the evolution of the collectivity in this region.