Rapid onset of collectivity in the vicinity of 78Ni

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dc.creatorMatthieu, Lebois
dc.creatorVerney, David
dc.creatorIbrahim, Fadi
dc.creatorEssabaa, Said
dc.creatorAzaiez, Faiçal
dc.creatorMhamed, Maher Cheikh
dc.creatorCottereau, Evelyne
dc.creatorViet, Cuong Phan
dc.creatorFerraton, Mathieu
dc.creatorFlanagan, Kieran
dc.creatorFranchoo, Serge
dc.creatorMueller, Dominique Guillemaud
dc.creatorHammache, Fairouz
dc.creatorLau, Christophe
dc.creatorBlanc, François Le
dc.creatorDu, Jean François Le
dc.creatorMouginot, Baptiste
dc.creatorPetrache, Costel
dc.creatorRoussière, Brigitte
dc.creatorSagui, Lionel
dc.creatorDe Sereville, Nicolas
dc.creatorStefan, Iulian
dc.creatorTastet, Benoit
dc.date2008-10-21
dc.date.accessioned2026-07-07T10:12:12Z
dc.date.available2026-07-07T10:12:12Z
dc.descriptiongamma-rays following the B and B-n decay of the very neutron rich 84Ga produced by photo-fission of 238U have been studied at the newly built ISOL facility of IPN Orsay: ALTO. Two activities were observed and assigned to two B-decaying states: 84gGa, I = (0\^-) and 84mGa, I = (3\^-, 4\^-). Excitation energies of the 2+1 and 4+1 excited states of 84Ge were measured at E(2+1) = 624.3 keV and E(4+1) = 1670.1 keV. Comparison with HFB+GCM calculations allows to establish the collective character of this nucleus indicating a substantial N=50 core polarization. The excitation energy of the 1/2+1 state in 83Ga known to carry a large part of the neutron 3s1/2 strength was measured at 247.8keV. Altogether these data allow to confirm the new single particle state ordering which appears immediately after the double Z=28 and N=50 shell closure and to designate 78Ni as a fragile and easily polarized doubly-magic core.
dc.description4 pages, ReVTeX
dc.identifierhttps://arxiv.org/abs/0810.3890
dc.identifierhttp://arxiv.org/abs/0810.3890
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/172106
dc.subjectNuclear Experiment
dc.titleRapid onset of collectivity in the vicinity of 78Ni
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