High-spin spectroscopy and shell-model interpretation of the N < 126 radium isotopes Ra 212 and Ra 213 HIGH-SPIN SPECTROSCOPY and SHELL-MODEL ... T. PALAZZO et al.

T. Palazzo, G. J. Lane, A. E. Stuchbery, A. J. Mitchell, A. Akber, M. S.M. Gerathy, S. S. Hota, T. Kibédi, B. Q. Lee, N. Palalani, M. W. Reed

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    6 Citations (Scopus)

    Abstract

    The level structures of Ra212 and Ra213 have been established via time-correlated γ-ray spectroscopy following the Pb204(C12,4n)Ra212 and Pb204(C13,4n)Ra213 reactions. In Ra212, levels up to ∼6.2MeV were identified and firm spin-parity assignments were achieved to a Jπ=19+ isomer with a mean life of 31(3) ns. For Ra213 the corresponding values were ∼4.5MeV in excitation energy and Jπ=33/2+. Two isomeric states with Jπ=23/2+, τ=27(3) ns and Jπ=33/2+, τ=50(3) ns were discovered in Ra213. The experimental data were compared with semiempirical shell-model calculations, which allowed dominant configurations to be assigned to most of the observed levels.

    Original languageEnglish
    Article number014323
    JournalPhysical Review C
    Volume97
    Issue number1
    DOIs
    Publication statusPublished - 31 Jan 2018

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