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High-precision QEC-value measurement of the superallowed β+ emitter 22Mg and an ab initio evaluation of the A=22 isobaric triplet

A direct QEC-value measurement of the superallowed β+ emitter 22Mg was performed using TRIUMF's Ion Trap for Atomic and Nuclear Science. The direct ground-state to ground-state atomic mass difference between 22Mg and 22Na was determined to be QEC=4781.40(22) keV, representing the most precise s...

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Bibliographic Details
Main Authors: Reiter, Moritz Pascal (Author) , Drozdowski, Oliver (Author)
Format: Article (Journal)
Language:English
Published: 8 November 2017
In: Physical review
Year: 2017, Volume: 96, Issue: 5
ISSN:2469-9993
DOI:10.1103/PhysRevC.96.052501
Online Access:Verlag, Volltext: http://dx.doi.org/10.1103/PhysRevC.96.052501
Verlag, Volltext: https://link.aps.org/doi/10.1103/PhysRevC.96.052501
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Author Notes:M.P. Reiter, K.G. Leach, O.M. Drozdowski, S.R. Stroberg, J.D. Holt, C. Andreoiu, C. Babcock, B. Barquest, M. Brodeur, A. Finlay, M. Foster, A.T. Gallant, G. Gwinner, R. Klawitter, B. Kootte, A.A. Kwiatkowski, Y. Lan, D. Lascar, E. Leistenschneider, A. Lennarz, S. Paul, R. Steinbrügge, R.I. Thompson, M. Wieser, J. Dilling
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Summary:A direct QEC-value measurement of the superallowed β+ emitter 22Mg was performed using TRIUMF's Ion Trap for Atomic and Nuclear Science. The direct ground-state to ground-state atomic mass difference between 22Mg and 22Na was determined to be QEC=4781.40(22) keV, representing the most precise single measurement of this quantity to date. In a continued push toward calculating superallowed isospin-symmetry-breaking corrections from first principles, ab initio shell-model calculations of the A=22 isobaric multiplet mass equation are also presented for the first time using the valence-space in-medium similarity renormalization group formalism. With particular starting two- and three-nucleon forces, this approach demonstrates good agreement with the experimental data.
Item Description:Gesehen am 15.05.2018
Im Titel ist "EC" in QEC tiefgestellt, "+" in "β+" hochgestellt
Physical Description:Online Resource
ISSN:2469-9993
DOI:10.1103/PhysRevC.96.052501

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