Darmstadt 2016 – scientific programme
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HK: Fachverband Physik der Hadronen und Kerne
HK 58: Structure and Dynamics of Nuclei XI
HK 58.4: Talk
Thursday, March 17, 2016, 17:30–17:45, S1/01 A03
Lifetime measurement in neutron-rich A ∼ 100 nuclei — •Saba Ansari, Jan Jolie, Jean-Marc Régis, Nima Saed-Samii, and Nigel Warr for the EXILL-FATIMA collaboration — Institute for Nuclear Physics, University of Cologne, Cologne, Germany
Rapid shape changes are observed in the region of neutron rich nuclei with a mass around A=100. Precise lifetime measurements are a key ingredient in the systematic study of the evolution of nuclear deformation and the degree of collectivity in this region. Nuclear lifetimes of excited states can be obtained using the fast-timing technique with LaBr3(Ce)-scintillators.
We used neutron induced fission of 241Pu in order to study lifetimes of excited states of fission fragments in the A ∼ 100 region. The EXILL-FATIMA array located at the PF1B cold neutron beam line at the Institut Laue-Langevin comprises of 8 BGO-shielded EXOGAM clover detectors and 16 very fast LaBr3(Ce)-scintillator detectors, which were installed around the fission target. We have studied the lifetimes of low lying states for the nuclei 98Zr, 100Zr and 102Zr by applying the generalized centroid difference method. In this contribution we will report on the used fast-timing setup and present preliminary results for the studied isotopes.