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The 84,85Br nuclei have been produced as fission fragments in the fusion reaction 18O+208Pb at 85 MeV bombarding energy and studied with the Euroball IV array. The high-spin states of the odd-odd 84Br nucleus have been identified for the first time. From angular correlation analysis, spin values have been assigned to most of the 85Br excited states up to 4 MeV. All observed states in 84,85Br can be described by various proton excitations involving at least the two sub-shells (πf5/2 and πp3/2) located just above the Z = 28 shell closure. [ABSTRACT FROM AUTHOR]

During an experiment at Jyväskylä laboratory involving a 27 MeV α beam on a thick 154Sm target, γ-spectroscopy of 156Gd was performed using JUROGAM HPGe multidetector array. We will present here experimental results concerning positive parity bands of this nucleus. Level scheme was enriched with more than ten new transitions as well as a new level in a band observed recently. [ABSTRACT FROM AUTHOR]

High-spin states of 84Se, produced as a fission fragment in the fusion-fission reaction 18O+208Pb, have been identified for the first time thanks to the EUROBALL IV array. The excitation energies of three of these states, interpreted as being due to the (νg9/2-1 νd5/2+1) neutron-core excitation, give new insights about the evolution of the N=50 shell gap at the vicinity of 78Ni. © 2006 American Institute of Physics [ABSTRACT FROM AUTHOR]