QEC -value determination for Na21→Ne21 and Mg23→Na23 mirror-nuclei decays using high-precision mass spectrometry with ISOLTRAP at the CERN ISOLDE facility
| Autor: | L. Hayen, A. Welker, Kai Zuber, Frank Wienholtz, J. Karthein, Klaus Blaum, Robert Wolf, D. Lunney, M. Breitenfeldt, Vladimir Manea, Lutz Schweikhard, M. Mougeot, Nathal Severijns, Dinko Atanasov, Dennis Neidherr, Vira Bondar, Sebastian George |
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| Rok vydání: | 2019 |
| Předmět: | |
| Zdroj: | Physical Review C. 100 |
| ISSN: | 2469-9993 2469-9985 |
| Popis: | We report on high-precision ${Q}_{\mathrm{EC}}$ values of the $^{21}\mathrm{Na}\ensuremath{\rightarrow}^{21}\mathrm{Ne}$ and $^{23}\mathrm{Mg}\ensuremath{\rightarrow}^{23}\mathrm{Na}$ mirror $\ensuremath{\beta}$ transitions from mass measurements with ISOLTRAP at the CERN ISOLDE facility. A precision of $\ensuremath{\delta}m/m=9\ifmmode\times\else\texttimes\fi{}{10}^{\ensuremath{-}10}$ and $\ensuremath{\delta}m/m=1.5\ifmmode\times\else\texttimes\fi{}{10}^{\ensuremath{-}9}$ was reached for the masses of $^{21}\mathrm{Na}$ and $^{23}\mathrm{Mg}$, respectively. We reduce the uncertainty of the ${Q}_{\mathrm{EC}}$ values by a factor of 5, making them the most precise experimental input data for the calculation of the corrected $\mathcal{F}t$ value of these mixed Fermi and Gamow-Teller transitions. For the $^{21}\mathrm{Na}\ensuremath{\rightarrow}^{21}\mathrm{Ne}\phantom{\rule{4pt}{0ex}}{Q}_{\mathrm{EC}}$ value, a $2.3\ensuremath{\sigma}$ deviation from the literature ${Q}_{\mathrm{EC}}$ value was found. |
| Databáze: | OpenAIRE |
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