Abstract
A high-precision half-life measurement for the superallowed β+ transition between the isospin T=1/2 mirror nuclei Na21 and Ne21 has been performed at the TRIUMF-ISAC radioactive ion beam facility yielding T1/2=22.4506(33) s, a result that is a factor of 4 more precise than the previous world-average half-life for Na21 and represents the single most precisely determined half-life for a transition between mirror nuclei to date. The contribution to the uncertainty in the Na21 Ftmirror value due to the half-life is now reduced to the level of the nuclear-structure-dependent theoretical corrections, leaving the branching ratio as the dominant experimental uncertainty.
Original language | English (US) |
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Article number | 025501 |
Journal | Physical Review C |
Volume | 96 |
Issue number | 2 |
DOIs | |
State | Published - Aug 9 2017 |
Funding
The authors would like to thank the GPS Collaboration and the TRIUMF-ISAC operators and target group. This work was supported by FWO-Vlaanderen (Belgium) and the Natural Sciences and Engineering Research Council of Canada (NSERC). C.E.S. acknowledges support from the Canada Research Chairs program. TRIUMF receives federal funding via a contribution agreement through the National Research Council of Canada (NRC).
ASJC Scopus subject areas
- Nuclear and High Energy Physics