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

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

doi:10.1103/PhysRevC.96.052501

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

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. LennarzS. Paul, R. Steinbrügge, R. I. Thompson, M. Wieser, J. Dilling

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Abstract

A direct QEC-value measurement of the superallowed β+ emitter Mg22 was performed using TRIUMF's Ion Trap for Atomic and Nuclear Science. The direct ground-state to ground-state atomic mass difference between Mg22 and Na22 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.

Original language	English
Article number	052501
Journal	Physical Review C
Volume	96
Issue number	5
DOIs	https://doi.org/10.1103/PhysRevC.96.052501
State	Published - Nov 6 2017
Externally published	Yes

Funding

The authors thank J. Simonis and A. Schwenk for providing the 1.8/2.0 (EM) 3N matrix elements, and A. Calci for providing the NN+3N(400) 3N matrix elements used in this work. K.G.L. would like to thank G. F. Grinyer and J. C. Hardy for useful discussions on the multiplet and superallowed review. This work is supported in part by the National Sciences and Engineering Research Council of Canada (NSERC), the US Department of Energy Office of Science under Grant No. DE-SC0017649, the US Department of Energy by Lawrence Livermore National Laboratory under Contract No. DE-AC52-07NA27344, and the US National Science Foundation under Grant No. PHY-1419765. TRIUMF receives federal funding via a contribution agreement with the National Research Council of Canada (NRC). Computations were performed with an allocation of computing resources at the Jülich Supercomputing Center (JURECA). M.P.R. is funded by Justus-Liebig-Universität Giessen and GSI under the JLU-GSI strategic Helmholtz partnership agreement. A.T.G. and E.L. acknowledge student support from the NSERC CGS-D program, and Brazil's Conselho Nacional de Desenvolvimento Científico e Technológico (CNPq), respectively.

Funders	Funder number
Conselho Nacional de Desenvolvimento Científico e Technológico
Justus-Liebig-Universität Giessen
National Sciences and Engineering Research Council of Canada
US Department of Energy
US Department of Energy Office of Science	DE-SC0017649
US National Science Foundation	PHY-1419765
National Science Foundation	1419765, 1713857
National Science Foundation
Lawrence Livermore National Laboratory	DE-AC52-07NA27344
Lawrence Livermore National Laboratory
Conselho Nacional de Desenvolvimento Científico e Tecnológico
GSI Helmholtzzentrum für Schwerionenforschung GmbH

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10.1103/PhysRevC.96.052501

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Reiter, M. P., Leach, K. G., Drozdowski, O. M., Stroberg, S. R., Holt, J. D., Andreoiu, C., Babcock, C., Barquest, B., Brodeur, M., Finlay, A., Foster, M., Gallant, A. T., Gwinner, G., Klawitter, R., Kootte, B., Kwiatkowski, A. A., Lan, Y., Lascar, D., Leistenschneider, E., ... Dilling, J. (2017). High-precision QEC -value measurement of the superallowed β+ emitter Mg 22 and an ab initio evaluation of the A=22 isobaric triplet. Physical Review C, 96(5), Article 052501. https://doi.org/10.1103/PhysRevC.96.052501

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

abstract = "A direct QEC-value measurement of the superallowed β+ emitter Mg22 was performed using TRIUMF's Ion Trap for Atomic and Nuclear Science. The direct ground-state to ground-state atomic mass difference between Mg22 and Na22 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.",

author = "Reiter, {M. P.} and Leach, {K. G.} and Drozdowski, {O. M.} and Stroberg, {S. R.} and Holt, {J. D.} and C. Andreoiu and C. Babcock and B. Barquest and M. Brodeur and A. Finlay and M. Foster and Gallant, {A. T.} and G. Gwinner and R. Klawitter and B. Kootte and Kwiatkowski, {A. A.} and Y. Lan and D. Lascar and E. Leistenschneider and A. Lennarz and S. Paul and R. Steinbr{\"u}gge and Thompson, {R. I.} and M. Wieser and J. Dilling",

note = "Publisher Copyright: {\textcopyright} 2017 American Physical Society.",

year = "2017",

month = nov,

day = "6",

doi = "10.1103/PhysRevC.96.052501",

language = "English",

volume = "96",

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Reiter, MP, Leach, KG, Drozdowski, OM, Stroberg, SR, Holt, JD, Andreoiu, C, Babcock, C, Barquest, B, Brodeur, M, Finlay, A, Foster, M, Gallant, AT, Gwinner, G, Klawitter, R, Kootte, B, Kwiatkowski, AA, Lan, Y, Lascar, D, Leistenschneider, E, Lennarz, A, Paul, S, Steinbrügge, R, Thompson, RI, Wieser, M & Dilling, J 2017, 'High-precision QEC -value measurement of the superallowed β+ emitter Mg 22 and an ab initio evaluation of the A=22 isobaric triplet', Physical Review C, vol. 96, no. 5, 052501. https://doi.org/10.1103/PhysRevC.96.052501

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T1 - High-precision QEC -value measurement of the superallowed β+ emitter Mg 22 and an ab initio evaluation of the A=22 isobaric triplet

AU - Reiter, M. P.

AU - Leach, K. G.

AU - Drozdowski, O. M.

AU - Stroberg, S. R.

AU - Holt, J. D.

AU - Andreoiu, C.

AU - Babcock, C.

AU - Barquest, B.

AU - Brodeur, M.

AU - Finlay, A.

AU - Foster, M.

AU - Gallant, A. T.

AU - Gwinner, G.

AU - Klawitter, R.

AU - Kootte, B.

AU - Kwiatkowski, A. A.

AU - Lan, Y.

AU - Lascar, D.

AU - Leistenschneider, E.

AU - Lennarz, A.

AU - Paul, S.

AU - Steinbrügge, R.

AU - Thompson, R. I.

AU - Wieser, M.

AU - Dilling, J.

PY - 2017/11/6

Y1 - 2017/11/6

N2 - A direct QEC-value measurement of the superallowed β+ emitter Mg22 was performed using TRIUMF's Ion Trap for Atomic and Nuclear Science. The direct ground-state to ground-state atomic mass difference between Mg22 and Na22 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.

AB - A direct QEC-value measurement of the superallowed β+ emitter Mg22 was performed using TRIUMF's Ion Trap for Atomic and Nuclear Science. The direct ground-state to ground-state atomic mass difference between Mg22 and Na22 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.

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JO - Physical Review C

JF - Physical Review C

IS - 5

M1 - 052501

ER -

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

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