Nuclear Resonance Fluorescence in <sup>74</sup>Ge

ORAL

Abstract

The germanium isotopes are known to display shape coexistence. Understanding the structure of 74Ge is key to tracking the transition from an oblate to a prolate shape along the isotopic chain. We investigate the structure of 74Ge using nuclear resonance fluorescence by exiting low-spin levels with a photon beam provided by the High Intensity Gamma-Ray Source (HIGS) at TUNL. This work identified several new levels and decays between 3 and 5.6 MeV and determined their spin, parity, as well as their integrated photon scattering cross sections. We observed decays to the low-lying 0+ and 2+ states and determined branching ratios and the multipolarity of the electromagnetic transitions, when possible. Comparisons with shell-model calculations will be presented.

*This material is based upon work supported by the U.S. Department of Energy, Office of Science, Office of Nuclear Physics, under Grants No. DE-FG02-97ER41041 (UNC), No. DE-FG02-97ER41033 (TUNL) and under Contract No. DE-AC52-07NA27344 (LLNL), and by the U.S. National Science Foundation under Grant No. PHY-1913028 (UK).

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Presenters

  • Samantha R Johnson

    • Triangle Universities Nuclear Laboratory

Authors

  • Samantha R Johnson

    • Triangle Universities Nuclear Laboratory

  • Udo Friman-Gayer

    • Duke University, Triangle Universities Nuclear Laboratory

  • Robert V.F. V Janssens

    • University of North Carolina at Chapel Hill
    • University of North Carolina at Chapel Hill, Triangle Universities Nuclear Laboratory

  • B. Alex Brown

    • Michigan State University
    • Michigan State University, Facility for Rare Isotope Beams

  • Sean W Finch

    • Duke University

  • FNU Krishichayan

    • Duke University
    • Duke University, Triangle Universities Nuclear Laboratory

  • David R Little

    • University of North Carolina at Chapel Hill, Triangle Universities Nuclear Laboratory

  • Sharmistha Mukhopadhyay

    • University of Kentucky

  • Erin E Peters

    • U of Kentucky

  • Anthony Paul D Ramirez

    • Lawrence Livermore National Laboratory
    • LLNL

  • Jack A Silano

    • Lawrence Livermore National Laboratory

  • Anton P Tonchev

    • Lawrence Livermore National Laboratory
    • Lawrence Livermore Natl Lab

  • Steven W Yates

    • University of Kentucky