Nuclear spins and moments of Ga isotopes reveal sudden structural changes between N=40 and N=50

B. Cheal, E. Mané, J. Billowes, M. L. Bissell, K. Blaum, B. A. Brown, F. C. Charlwood, K. T. Flanagan, D. H. Forest, C. Geppert, M. Honma, A. Jokinen, M. Kowalska, A. Krieger, J. Krämer, I. D. Moore, R. Neugart, G. Neyens, W. Nörtershäuser, M. SchugH. H. Stroke, P. Vingerhoets, D. T. Yordanov, M. Žáková

    Research output: Contribution to journalArticlepeer-review

    Abstract

    Collinear laser spectroscopy was performed on Ga (Z=31) isotopes at ISOLDE, CERN. A gas-filled linear Paul trap (ISCOOL) was used to extend measurements towards very neutron-rich isotopes (N=36-50). A ground state (g.s.) spin I=1/2 is measured for Ga73, being near degenerate with a 3/2- isomer (75eV Eex 1keV). The Ga79 g.s., with I=3/2, is dominated by protons in the πf5/2 orbital and in Ga81 the 5/2- level becomes the g.s. The data are compared to shell-model calculations in the f5/2pg9/2 model space, calling for further theoretical developments and new experiments.

    Original languageEnglish (US)
    Article number252502
    JournalPhysical Review Letters
    Volume104
    Issue number25
    DOIs
    StatePublished - Jun 23 2010

    ASJC Scopus subject areas

    • Physics and Astronomy(all)

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