Measurement of the Branching Ratio for the Beta Decay of 14O

P.A. Voytas, E.A. George, Gregory Severin, L. Zhan, L.D. Knutson

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Abstract

We present a new measurement of the branching ratio for the decay of 14O to the ground state of 14N. The experimental result, l0/ltotal = (4.934 0.040(stat.) 0.061(syst.)) ×10-3, is significantly smaller than previous determinations of this quantity. The new measurement allows an improved determination of the partial halflife for the superallowed 0+ 0+ Fermi decay to the 14N first excited state, which impacts the determination of the Vud element of the CKM matrix. With the new measurement in place, the corrected 14O F t value is in good agreement with the average F t for other superallowed 0+ 0+ Fermi decays.
Original languageEnglish
JournalPhysical Review C
Number of pages8
ISSN2469-9985
Publication statusAccepted/In press - 2015
Externally publishedYes

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