Nuclear matrix elements for the48Ca two-neutrino double-β decay from high-resolution charge-exchange reactions

S. Rakers, C. Bäumer, A. M. Van Den Berg, B. Davids, D. Frekers, D. De Prenne, Y. Fujita, E. W. Grewe, P. Haefner, M. N. Harakeh, M. Hunyadi, E. Jacobs, H. Johansson, B. C. Junk, A. Korff, A. Negret, L. Popescu, H. Simon, H. J. Wörtche

Research output: Contribution to journalArticle

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Abstract

The two-neutrino double-β (2vββ) decay represents a test case for our knowledge about the nuclear structure of the involved isobars. The decay of 48Ca is an especially interesting case because it holds an anomaly of a uniquely high Qββ value and a comparatively long half-life, which points to a peculiar nuclear structure situation. The nuclear matrix element relevant for ββ decay can be calculated, if the complete set of Gamow-Teller (GT) matrix elements for the two virtual transitions in the perturbative description are known. Using the high-resolution (d,2He) probe, we have measured the GT+ strength distribution in 48Sc, which is the intermediate nucleus in the 48Ca ββ decay. By combining our measured GT distribution with data from a 48Ca(p,n) experiment and taking into account relative phases between individual matrix elements, which can be gained from theoretical models, one can compute the double-GT matrix element and deduce the half-life of the 48Ca 2vββ decay.

Original languageEnglish
Pages (from-to)54302-54301
Number of pages2
JournalPhysical Review C - Nuclear Physics
Volume70
Issue number5
DOIs
Publication statusPublished - Nov 2004

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charge exchange
neutrinos
high resolution
decay
matrices
nuclear structure
half life
isobars
Q factors
anomalies
nuclei
probes

ASJC Scopus subject areas

  • Physics and Astronomy(all)
  • Nuclear and High Energy Physics

Cite this

Rakers, S., Bäumer, C., Van Den Berg, A. M., Davids, B., Frekers, D., De Prenne, D., ... Wörtche, H. J. (2004). Nuclear matrix elements for the48Ca two-neutrino double-β decay from high-resolution charge-exchange reactions. Physical Review C - Nuclear Physics, 70(5), 54302-54301. https://doi.org/10.1103/PhysRevC.70.054302

Nuclear matrix elements for the48Ca two-neutrino double-β decay from high-resolution charge-exchange reactions. / Rakers, S.; Bäumer, C.; Van Den Berg, A. M.; Davids, B.; Frekers, D.; De Prenne, D.; Fujita, Y.; Grewe, E. W.; Haefner, P.; Harakeh, M. N.; Hunyadi, M.; Jacobs, E.; Johansson, H.; Junk, B. C.; Korff, A.; Negret, A.; Popescu, L.; Simon, H.; Wörtche, H. J.

In: Physical Review C - Nuclear Physics, Vol. 70, No. 5, 11.2004, p. 54302-54301.

Research output: Contribution to journalArticle

Rakers, S, Bäumer, C, Van Den Berg, AM, Davids, B, Frekers, D, De Prenne, D, Fujita, Y, Grewe, EW, Haefner, P, Harakeh, MN, Hunyadi, M, Jacobs, E, Johansson, H, Junk, BC, Korff, A, Negret, A, Popescu, L, Simon, H & Wörtche, HJ 2004, 'Nuclear matrix elements for the48Ca two-neutrino double-β decay from high-resolution charge-exchange reactions', Physical Review C - Nuclear Physics, vol. 70, no. 5, pp. 54302-54301. https://doi.org/10.1103/PhysRevC.70.054302
Rakers, S. ; Bäumer, C. ; Van Den Berg, A. M. ; Davids, B. ; Frekers, D. ; De Prenne, D. ; Fujita, Y. ; Grewe, E. W. ; Haefner, P. ; Harakeh, M. N. ; Hunyadi, M. ; Jacobs, E. ; Johansson, H. ; Junk, B. C. ; Korff, A. ; Negret, A. ; Popescu, L. ; Simon, H. ; Wörtche, H. J. / Nuclear matrix elements for the48Ca two-neutrino double-β decay from high-resolution charge-exchange reactions. In: Physical Review C - Nuclear Physics. 2004 ; Vol. 70, No. 5. pp. 54302-54301.
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