Published January 1, 2013 | Version v1
Conference paper Open

Lifetime measurements on fission fragments in the A similar to 100 region

  • 1. CEA Saclay, IRFU Serv Phys Nucl, F-91191 Gif Sur Yvette, France
  • 2. Univ Oslo, Dept Phys, N-0316 Oslo, Norway
  • 3. Univ Cologne, Inst Kernphys, D-50937 Cologne, Germany
  • 4. GANIL, CEA DSM, CNRS IN2P3, F-14706 Caen, France
  • 5. Nigde Univ, Fac Sci, Nigde, Turkey
  • 6. Ist Nazl Fis Nucl, Lab Nazl Legnaro, I-35020 Legnaro, Italy
  • 7. CEA, DAM, DIF, F-91297 Arpajon, France

Description

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.

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