New determination of double-β-decay properties in 48Ca: high-precision Qββ-value measurement and improved nuclear matrix element calculations
We report a direct measurement of the Qββ value of the neutrinoless double-β-decay candidate 48Ca at the TITAN Penning-trap mass spectrometer, with the result that Qββ=4267.98(32)keV. We measured the masses of both the mother and daughter nuclides, and in the latter case found a 1 keV deviation from...
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| Hauptverfasser: | , , , , , , , , , , , , , , , , , , |
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| Dokumenttyp: | Article (Journal) |
| Sprache: | Englisch |
| Veröffentlicht: |
9 April 2014
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| In: |
Physical review. C, Nuclear physics
Year: 2014, Jahrgang: 89, Heft: 4 |
| ISSN: | 1089-490X |
| DOI: | 10.1103/PhysRevC.89.045502 |
| Online-Zugang: | Resolving-System, lizenzpflichtig, Volltext: https://doi.org/10.1103/PhysRevC.89.045502 Verlag, lizenzpflichtig, Volltext: https://link.aps.org/doi/10.1103/PhysRevC.89.045502 
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| Verfasserangaben: | A.A. Kwiatkowski, T. Brunner, J.D. Holt, A. Chaudhuri, U. Chowdhury, M. Eibach, J. Engel, A.T. Gallant, A. Grossheim, M. Horoi, A. Lennarz, T.D. Macdonald, M.R. Pearson, B.E. Schultz, M.C. Simon, R.A. Senkov, V.V. Simon, K. Zuber, and J. Dilling |
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| 245 | 1 | 0 | |a New determination of double-β-decay properties in 48Ca |b high-precision Qββ-value measurement and improved nuclear matrix element calculations |c A.A. Kwiatkowski, T. Brunner, J.D. Holt, A. Chaudhuri, U. Chowdhury, M. Eibach, J. Engel, A.T. Gallant, A. Grossheim, M. Horoi, A. Lennarz, T.D. Macdonald, M.R. Pearson, B.E. Schultz, M.C. Simon, R.A. Senkov, V.V. Simon, K. Zuber, and J. Dilling |
| 246 | 3 | 0 | |a beta β double-beta-decay ^48Ca Qββ |
| 246 | 3 | 3 | |a New determination of double-beta-decay properties in 48 Ca |
| 264 | 1 | |c 9 April 2014 | |
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| 500 | |a Im Titel ist die Zahl 48 hochgestellt, die Zeichen ββ sind tiefgestellt | ||
| 500 | |a Gesehen am 04.09.2020 | ||
| 520 | |a We report a direct measurement of the Qββ value of the neutrinoless double-β-decay candidate 48Ca at the TITAN Penning-trap mass spectrometer, with the result that Qββ=4267.98(32)keV. We measured the masses of both the mother and daughter nuclides, and in the latter case found a 1 keV deviation from the literature value. In addition to the Qββ value, we also present results of a new calculation of the neutrinoless double-β-decay nuclear matrix element of 48Ca. Using diagrammatic many-body perturbation theory to second order to account for physics outside the valence space, we constructed an effective shell-model double-β-decay operator, which increased the nuclear matrix element by about 75% compared with that produced by the bare operator. The new Qββ value and matrix element strengthen the case for a 48Ca double-β-decay experiment. | ||
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