Beta Decay of Nutron-Rich Nuclei near N=20

ORAL

Abstract

Neutron-rich isotopes below 40Ca, a region collectively known as the “island of inversion”, is dominated by deformation arising from the diminishing N=20 shell gap.  Isotopes in this region of deformation have been particularly important to our understanding of the evolution of magic numbers from stability towards the neutron dripline.  Recently, the beta-decay of isotopes along the southern boundary of the island of inversion has been performed using the CCF at the NSCL.  A 48Ca beam was fragmented, the secondary beam was centered around 31Ne isotopes were subsequently selected using the A1900 separator and implanted in the BCS, allowing event-by-event particle identification and analysis to be performed. Excited states in the daughter nuclei are identified by emitted γ-rays collected with 16 Clover-style HPGe and 15 LaBr3 detectors surrounding the BCS in a rhombicuboctahedron geometry.  The current presentation will highlight the analysis process and as well as the structure of exotic Mg and Na isotopes.

*1This work was supported in part by the U.S. department of Energy grant and DE-FG02-94ER40848 (UML) and U.S. National Science Foundation under Grant No. PHY-2012522 (FSU).

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Presenters

  • Yiyi Zhu

    • UNIVERSITY OF MASSACHUSETTS Lowell

Authors

  • Yiyi Zhu

    • UNIVERSITY OF MASSACHUSETTS Lowell

  • Peter C Bender

    • University of Massachusetts Lowell

  • Elizabeth Rubino

    • Florida State University
    • FSU

  • Vandana Tripathi

    • Florida State University
    • FSU

  • Jesus F Perello

    • Florida State University
    • Florida State University, Tallahassee, FL.

  • Samuel L Tabor

    • Florida State University

  • Sean N Liddick

    • National Superconducting Cyclotron Laboratory
    • Michigan State University, NSCL/FRIB
    • NSCL
    • National Superconducting Cyclotron Laboratory; Department of Chemistry, Michigan State University
    • Michigan State University
    • National Superconducting Cyclotron Laboratory; Michigan State University
    • FRIB

  • Aaron Chester

    • Michigan State University
    • National Superconducting Cyclotron Laboratory

  • Andrea L Richard

    • Lawrence Livermore Natl Lab
    • National Superconducting Cyclotron Labor
    • Lawrence Livermore National Laboratory

  • Katie Childer

    • NSCL

  • Benjamin P Crider

    • Mississippi State Univ
    • Mississippi State University
    • Department of Physics and Astronomy, Mississippi State University

  • Timilehin H Ogunbeku

    • Mississippi State University
    • Department of Physics and Astronomy, Mississippi State University

  • A.M. M Rogers

    • University of Massachusetts Lowell
    • University of Massachusetts-Lowell

  • Daniel E Hoff

    • University of Massachusetts Lowell
    • Lawrence Livermore National Laboratory

  • Sudipta Saha

    • University of Massachusetts Lowell