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New determination of double- β -Decay properties in 48Ca: High-precision Qββ -Value measurement and improved nuclear matrix element calculations

Publication ,  Journal Article
Kwiatkowski, AA; Brunner, T; Holt, JD; Chaudhuri, A; Chowdhury, U; Eibach, M; Engel, J; Gallant, AT; Grossheim, A; Horoi, M; Lennarz, A ...
Published in: Physical Review C - Nuclear Physics
April 9, 2014

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. © 2014 American Physical Society.

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Published In

Physical Review C - Nuclear Physics

DOI

EISSN

1089-490X

ISSN

0556-2813

Publication Date

April 9, 2014

Volume

89

Issue

4

Related Subject Headings

  • Nuclear & Particles Physics
  • 0202 Atomic, Molecular, Nuclear, Particle and Plasma Physics
 

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Kwiatkowski, A. A., Brunner, T., Holt, J. D., Chaudhuri, A., Chowdhury, U., Eibach, M., … Dilling, J. (2014). New determination of double- β -Decay properties in 48Ca: High-precision Qββ -Value measurement and improved nuclear matrix element calculations. Physical Review C - Nuclear Physics, 89(4). https://doi.org/10.1103/PhysRevC.89.045502
Kwiatkowski, A. A., T. Brunner, J. D. Holt, A. Chaudhuri, U. Chowdhury, M. Eibach, J. Engel, et al. “New determination of double- β -Decay properties in 48Ca: High-precision Qββ -Value measurement and improved nuclear matrix element calculations.” Physical Review C - Nuclear Physics 89, no. 4 (April 9, 2014). https://doi.org/10.1103/PhysRevC.89.045502.
Kwiatkowski AA, Brunner T, Holt JD, Chaudhuri A, Chowdhury U, Eibach M, et al. New determination of double- β -Decay properties in 48Ca: High-precision Qββ -Value measurement and improved nuclear matrix element calculations. Physical Review C - Nuclear Physics. 2014 Apr 9;89(4).
Kwiatkowski, A. A., et al. “New determination of double- β -Decay properties in 48Ca: High-precision Qββ -Value measurement and improved nuclear matrix element calculations.” Physical Review C - Nuclear Physics, vol. 89, no. 4, Apr. 2014. Scopus, doi:10.1103/PhysRevC.89.045502.
Kwiatkowski AA, Brunner T, Holt JD, Chaudhuri A, Chowdhury U, Eibach M, Engel J, Gallant AT, Grossheim A, Horoi M, Lennarz A, Macdonald TD, Pearson MR, Schultz BE, Simon MC, Senkov RA, Simon VV, Zuber K, Dilling J. New determination of double- β -Decay properties in 48Ca: High-precision Qββ -Value measurement and improved nuclear matrix element calculations. Physical Review C - Nuclear Physics. 2014 Apr 9;89(4).

Published In

Physical Review C - Nuclear Physics

DOI

EISSN

1089-490X

ISSN

0556-2813

Publication Date

April 9, 2014

Volume

89

Issue

4

Related Subject Headings

  • Nuclear & Particles Physics
  • 0202 Atomic, Molecular, Nuclear, Particle and Plasma Physics