Structure of neutron-rich tungsten nuclei and evidence for a 10- isomer in W190

G. J. Lane, G. D. Dracoulis, F. G. Kondev, R. O. Hughes, H. Watanabe, A. P. Byrne, M. P. Carpenter, C. J. Chiara, P. Chowdhury, R. V.F. Janssens, T. Lauritsen, C. J. Lister, E. A. McCutchan, D. Seweryniak, I. Stefanescu, S. Zhu

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    30 Citations (Scopus)

    Abstract

    Isomers in the neutron-rich nucleus W190 have been characterized. A 10 - state from the 9/2-[505] 11/2+[615] two-neutron configuration with a 240-μs lifetime decays via a K-allowed, 97-keV, M2 transition to an 8+ state with a 160-ns lifetime from the 9/2-[505] 7/2-[503] neutron configuration. New states have also been identified in W188, including a Kπ=8-, 158-ns isomer from the 9/2-[614] 7/2+[404] two-proton configuration. The K hindrance is observed to decrease with increasing neutron number, consistent with a trend toward increasing triaxial softness.

    Original languageEnglish
    Article number051304
    JournalPhysical Review C - Nuclear Physics
    Volume82
    Issue number5
    DOIs
    Publication statusPublished - 29 Nov 2010

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