Level Structure Above the \textbf{\textit{T}}$\bf{_{1/2} = 2.0 \times 10^5}$ yr Isomer in $^{\bf{186}}$Re

POSTER

Abstract

The level structure above the $K^{\pi}=(8^{+})$, 149-keV isomer in $^{186}$Re is largely undeveloped. The isomer could play a role in the $s$-process nucleosynthesis of $^{187}$Os and $^{187}$Re and affect the accuracy of the Re-Os cosmochronometer. An experiment was conducted at the Research Center for Nuclear Physics (RCNP) at Osaka University, Japan, using the Clover Array Gamma-ray spectrometer at RCNP/RIBF for Advanced research (CAGRA) to measure $\gamma$-ray coincidences from $(d,2n)$ reactions on an enriched $^{186}$W target. The $\gamma - \gamma$ coincidence data obtained from the CAGRA array were analyzed along with data from a similar experiment performed in 2006 at the Australian National University. A preliminary analysis of the data reveals several new levels and transitions feeding the $^{186m}$Re isomer.

Authors

  • D. A. Matters

    • Air Force Institute of Technology

  • John McClory

    • Air Force Institute of Technology

  • F. G. Kondev

    • Argonne National Laboratory

  • M. P. Carpenter

    • Argonne National Laboratory

  • J.J. Carroll

    • Army Research Laboratory
    • USArmy Research Laboratory

  • Christopher Chiara

    • Oak Ridge Associated Universities / Army Research Laboratory
    • U.S. Army Research Laboratory/ORAU
    • U.S. Army Research Laboratory

  • G. J. Lane

    • Australian National University

  • T. Kib{\' e}di

    • Australian National University

  • E. Ideguchi

    • RCNP, Osaka University

  • Y. Fang

    • RCNP, Osaka University

  • H. Watanabe

    • Beihang University