Precise branching ratio measurements in ${}^{19}$Ne beta decay and fundamental tests of the weak interaction

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.

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Cited by in corpus (4)

• Comprehensive analysis of beta decays within and beyond the Standard Model
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• Constraints on subleading interactions in beta decay Lagrangian
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