Experimental Study Of The Electromagnetic Transitions in Neutron-rich <sup>22</sup>F​

ORAL

Abstract

Excited states in the neutron-rich nucleus 22F were investigated using the 9Be(18O, α p)22F evaporation reaction. A 3 MeV/u 18O beam was delivered by the Argonne Tandem Linac Accelerator System (ATLAS). Prompt γ rays were detected using the 2π Gamma-Ray Energy Tracking In-beam Nuclear Array (GRETINA), comprising 48 high-purity germanium crystals. The recoiling 22F residues were identified and se- lected via the α + p channel using the Fragment Mass Analyzer. Doppler-corrected γ-γ coincidence spectra revealed new levels and transition branches. A level scheme was constructed, showing evidence for intruder configurations. Spin and parity assignments were extracted from angular distribution and linear polarization measurements. The experimental results were compared with shell-model calculations using the Universal sd (USD) effective interaction, providing insight into configuration mixing and shell evolution near the neutron dripline.

*Work supported by the U.S. Department of Energy Office of Science, Office of Nuclear Physics under Award No. DE-SC0024992(UML), Contract No. DE-AC52-07NA27344(LLNL), and Contract No. DE-AC02-06CH11357 (ANL). ​

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Presenters

  • Muzafar Ibrahim

    • University of Massachusetts Lowell

Authors

  • Muzafar Ibrahim

    • University of Massachusetts Lowell

  • Peter C Bender

    • University of Massachusetts Lowell

  • Brenden Longfellow

    • Lawrence Livermore National Laboratory

  • Claus M Müller-Gatermann

    • Argonne National Laboratory
    • ANL

  • Dariusz Seweryniak

    • Argonne National Laboratory

  • Tobias Beck

    • Facility for Rare Isotope Beams

  • Christopher M Campbell

    • Lawrence Berkeley National Laboratory

  • M.P. P Carpenter

    • Argonne National Laboratory

  • Patrick Copp

    • Argonne National Laboratory

  • Peter Farris

    • Michigan State University

  • Daniel E Hoff

    • Lawrence Livermore National Laboratory

  • Calem R Hoffman

    • Argonne National Laboratory

  • Amel Korichi

    • Argonne National Laboratory/Université d'Orsay

  • Torben Lauritsen

    • Argonne National Laboratory

  • Walter Reviol

    • Argonne National Laboratory

  • R Rubino

    • Facility for Rare Isotope Beams
    • Facility for Rare Isotope Beams, Michigan State University
    • National Superconducting Cyclotron Laboratory, Michigan State University

  • Marco Siciliano

    • Argonne National Laboratory

  • Yiyi Zhu

    • University of Massachusetts Lowell