New island of μs isomers in neutron-rich nuclei around the Z = 28 and N = 40 shell closures

R. Grzywacz, R. Béraud, C. Borcea, A. Emsallem, M. Glogowski, H. Grawe, D. Guillemaud-Mueller, M. Hjorth-Jensen, M. Houry, M. Lewitowicz, A. C. Mueller, A. Nowak, A. Plochocki, M. Pfützner, K. Rykaczewski, M. G. Saint-Laurent, J. E. Sauvestre, M. Schaefer, O. Sorlin, J. SzerypoW. Trinder, S. Viteritti, J. Winfield

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    191 Scopus citations

    Abstract

    New isomeric states in the neutron-rich nuclei near the Z=28 and N=40 shell closures have been identified among the reaction products of a 60.3A MeV 86Kr beam on a natNi target. From the measured isomeric decay properties information about the excited states and their nuclear structure has been obtained. The isomerism is related mostly to the occupation of the neutron g9/2 orbital, an intruder level in the N=3 fp shell. It is illustrated with the decay properties of 69Nim, 70Nim, and 71Cum interpreted within the nuclear shell model.

    Original languageEnglish
    Pages (from-to)766-769
    Number of pages4
    JournalPhysical Review Letters
    Volume81
    Issue number4
    DOIs
    StatePublished - 1998

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