1. Precise branching ratio measurements in $^{19}$Ne beta decay and fundamental tests of the weak interaction
- Author
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Rebeiro, B. M., Triambak, S., Mabika, P. Z., Finlay, P., Sumithrarachchi, C. S., Hackman, G., Ball, G. C., Garrett, P. E., Svensson, C. E., Cross, D. S., Dunlop, R., Garnsworthy, A. B., Kshetri, R., Orce, J. N., Pearson, M. R., Tardiff, E. R., Al-Falou, H., Austin, R. A. E., Churchman, R., Djongolov, M. K., D'Entremont, R., Kierans, C., Milovanovic, L., O'Hagan, S., Reeve, S., Sjue, S. K. L., Williams, S. J., and Ntshangase, S. S.
- Subjects
FOS: Physical sciences ,Nuclear Experiment (nucl-ex) ,Nuclear Experiment - Abstract
We used the 8$\pi$ $\gamma$-ray spectrometer at the TRIUMF-ISAC radiocative ion beam facility to obtain high-precision branching ratios for $^{19}$Ne $\beta^+$ decay to excited states in $^{19}$F. Together with other previous work, our measurements determine the superallowed $1/2^+ \to 1/2^+$ beta branch to the ground state in $^{19}$F to be 99.9878(7)\%, which is three times more precise than known previously. The implications of these measurements for testing a variety of weak interaction symmetries are discussed briefly.
- Published
- 2018