Unbound Excited States in $^{28}$Ne and $^{25}$F

ORAL

Abstract

The neutron dripline has only been conclusively mapped out to $Z=8$. The unbound structure of isotopes with $Z>8$ has not been studied until recently, when multiple studies have focused on unbound states in neutron-rich fluorine isotopes. Unbound states in $^{28}$Ne and $^{25}$F were populated in the reaction of a 102 MeV/nucleon $^{29}$Na beam on a beryllium target. This is the first such state in $^{28}$Ne and the second such state in $^{25}$F. The measured decay energy of 32(22) keV in the $^{27}$Ne + $n$ system corresponds to an unbound excited state in $^{28}$Ne of 3.86(11) MeV. The decay energy of the $^{24}$F + $n$ system was measured as 300(170) keV, which places the second measured unbound state of $^{25}$F at 4.66(17) MeV. Measured decay energy spectra and a discussion of results will be presented.

Authors

  • Jenna Smith

    • NSCL/Michigan State University
  • B. Alex Brown

    • NSCL/Michigan State University
  • Greg Christian

    • NSCL/Michigan State University
  • Shea Mosby

    • NSCL/Michigan State University
  • John F. Novak

    • NSCL/Michigan State University
  • Steven J. Quinn

    • NSCL/Michigan State University
  • Jesse Snyder

    • NSCL/Michigan State University
  • Artemis Spyrou

    • NSCL/Michigan State University
  • Michael J. Strongman

    • NSCL/Michigan State University
  • Michael Thoennessen

    • NSCL/Michigan State University
  • Thomas Baumann

    • NSCL
  • Zachary Kohley

    • NSCL
  • Joseph E. Finck

    • Central Michigan University
  • Calem R. Hoffman

    • ANL/Florida State University