Nuclear Resonance Fluorescence in 74Ge

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