Bulletin of the American Physical Society
5th Joint Meeting of the APS Division of Nuclear Physics and the Physical Society of Japan
Volume 63, Number 12
Tuesday–Saturday, October 23–27, 2018; Waikoloa, Hawaii
Session EG: Nuclear Structure A=100-140
7:00 PM–9:30 PM,
Thursday, October 25, 2018
Hilton
Room: King's 3
Chair: Kathrin Wimmer, The University of Tokyo
Abstract ID: BAPS.2018.HAW.EG.5
Abstract: EG.00005 : Penning trap mass spectrometry Q value determinations for investigating ultra-low Q value β-decays*
8:00 PM–8:15 PM
Presenter:
Matthew Redshaw
(Central Michigan University)
Authors:
Matthew Redshaw
(Central Michigan University)
Georg Bollen
(Michigan State University)
Fritz Buchinger
(McGill University)
Jason A Clark
(Argonne Natl Lab)
Martin Eibach
(GSI)
Nadeesha D Gamage
(Central Michigan University)
Kerim Gulyuz
(Central Michigan University)
Alec S Hamaker
(Michigan State University)
Christopher J Izzo
(Michigan State University)
Rodney Orford
(McGill University)
Daniel J Puentes
(Michigan State University)
Ryan J Ringle
(Michigan State University)
Rachel Sandler
(Central Michigan University)
Guy Savard
(Argonne Natl Lab)
Kumar Sharma
(University of Manitobia)
Isaac Yandow
(Michigan State University)
Ultra-low Q value (ULQ) β-decays, in which the parent decays to an excited state of the daughter with a Q<∼1 keV, are of interest because they can provide a testing ground for atomic interference effects in nuclear β-decay, and because of their potential as candidates for direct neutrino mass determination experiments. The lowest known Q value β-decay is that of 115In to the 3/2+ state in 115Sn with Qβ = 155(24) eV. Additional candidates, such as 115Cd and 135Cs have been identified by evaluating atomic mass and nuclear energy level data. We have also identified 112,113Ag, 89Sr and 139Ba as potential candidates. Current atomic mass data for the parent and/or daughter isotopes in these cases are not precise enough to determine whether the ULQ decay branches are energetically allowed. Here we present preliminary Q value measurement results for 112,113Ag, 115Cd, 89Sr and 139Ba using Penning trap mass spectrometry with the CPT mass spectrometer at Argonne National Lab and LEBIT at the National Superconducting Cyclotron Lab.
*This material is based upon work supported by the U.S. Department of Energy, Office of Science, Office of Nuclear Physics under Award Number DE-SC0015927 and Contract No. DE-AC02-06CH11357, and by the National Science Foundation under Contract No. PHY-1102511.
To cite this abstract, use the following reference: http://meetings.aps.org/link/BAPS.2018.HAW.EG.5
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