Bulletin of the American Physical Society
90th Annual Meeting of the Southeastern Section of the APS
Thursday–Saturday, November 9–11, 2023; Eastern Kentucky University, Richmond, Kentucky
Session H04: Low-Energy Nuclear Physics
8:30 AM–10:06 AM,
Friday, November 10, 2023
Keen Johnson
Room: Pearl Buchanon Theatre
Chair: Benjamin Crider, Mississippi State University
Abstract: H04.00004 : Beta Delayed Spectroscopy of 29F, observation of the first excited state of 29Ne*
9:06 AM–9:18 AM
Presenter:
James Christie
(University of Tennessee)
Authors:
James Christie
(University of Tennessee)
Miguel Madurga
(University of Tennessee)
Robert Grzywacz
(University of Tennessee)
Zhengyu Xu
(University of Tennessee Knoxville)
Philipp Wagenknecht
(University of Tennessee Knoxville)
Thomas T King
(Oak Ridge National Lab)
Shree Neupane
(Lawrence Livermore National Laboratory)
Joseph Heideman
(University of Tennessee)
Aaron Chester
(Michigan State University)
Andrea Richard
(Lawrence Livermore National Laboratory)
James M Allmond
(Oak Ridge National Lab)
Rin Yokoyama
(Center for Nuclear Study, the University of Tokyo)
Jesse N Farr
(University of Tennessee)
Kevin Siegl
(University of Tennessee)
Collaboration:
E19044 Collaboration
In this talk, I will present experimental work done at the National Superconducting Laboratory as a part of the E19044 collaboration. A 48Ca beam was fragmented to produce a cocktail beam of isotopes around Z=9, N=20 29F and separated by mass using the A1900 spectrometer. The cocktail beam was implanted in a YSO crystal, and the decay products were detected using 3 HPGe clovers for gamma rays and 48 VANDLE bars for beta delayed neutrons.
This presentation will focus on beta-delayed gamma and neutron spectroscopy of 29F. We have observed for the first time a gamma transition at 174 keV. From the observed beta feeding we deduce it corresponds to a Gamow-Teller transition, which we interpret as the first excited state of 3/2+ spin parity. Our measurement supports a 3/2- 29Ne ground state, thus likely being in the island of inversion, as previously indicated by several reaction experiments (A. Revel 2023, N. Kobayashi 2016, H.N. Liu 2017)
*This research was sponsored in part by the Office of Nuclear Physics, U.S. Department of Energy, under Award No. DE-FG02-96ER40983 (UTK), and by the National Nuclear Security Administration under the Stewardship Science Academic Alliances programthrough DOE Award No. DE-NA0003899.
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