Determination of the QEC values of the T =1 /2 mirror nuclei 21Na and 29P at LEBIT
Abstract
We report the first direct measurement of the transition energy QEC of the 21Na mixed Fermi-Gamow-Teller decay. This is the first of the T =1 /2 mirror nuclei decays used for the determination of Vud to be measured with Penning trap mass spectrometry. In addition, the 29P mass was measured directly for the first time and used along with the mass of its daughter, 29Si, for the independent QEC determination of this decay. The obtained QEC(21Na)=3547.11 (9 ) keV and ME (29P)=-169 53.15 (47 ) keV significantly improve the latest published values and reduce the contribution of the QEC uncertainty on F tmirror to the same order as the theoretical corrections.
- Publication:
-
Physical Review C
- Pub Date:
- October 2015
- DOI:
- Bibcode:
- 2015PhRvC..92d5502E
- Keywords:
-
- 21.10.Dr;
- 24.80.+y;
- 37.10.Ty;
- 82.80.Qx;
- Binding energies and masses;
- Nuclear tests of fundamental interactions and symmetries;
- Ion trapping;
- Ion cyclotron resonance mass spectrometry