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Fission time measurements: a new probe into super-heavy element stability

Abstract : Reaction mechanism analyses performed with a 4 $\pi$ detector for the systems $^{208}$Pb+Ge, $^{238}U+Ni and $^{238}$U+Ge, combined with analyses of the associated reaction time distributions, provide us with evidence for nuclei with Z=120 and 124 living longer than $10^−18$s and arising from highly excited compound nuclei. By contrast, the neutron deficient nuclei with Z=114 possibly formed in $^{208}$Pb+Ge reactions have shorter lifetimes, close to or below the sensitivity limit of the experiment.
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Submitted on : Tuesday, June 24, 2008 - 10:38:40 AM
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M. Morjean, D. Jacquet, J.L. Charvet, A. l'Hoir, M. Laget, et al.. Fission time measurements: a new probe into super-heavy element stability. Physical Review Letters, American Physical Society, 2008, 101, pp.072701. ⟨10.1103/PhysRevLett.101.072701⟩. ⟨in2p3-00289928⟩

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