Lifetime measurements on fission fragments in the A ~ 100 region.

Authors :: Grente, L.
Salsac, M.-D.
Korten, W.
Görgen, A.
Hagen, T. W.
Braunroth, T.
Bruyneel, B.
Celikovic, I.
Clément, E.
Delaune, O.
Dijon, A.
Drouart, A.
Ertürk, S.
Farget, F.
de France, G.
Gottardo, A.
Hackstein, M.
Jacquot, B.
Libert, J.
Litzinger, J.
Source :: EPJ Web of Conferences; 2013, Issue 62, p1-6, 6p
Publication Year :: 2013
Abstract: Lifetimes of first 4<superscript>+</superscript> and 6<superscript>+</superscript> 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 γ-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. [ABSTRACT FROM AUTHOR]