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Precise half-life measurements for the superallowed beta(+) emitters Ar-34 and Cl-34
(American Physical Society, 2006)
To contribute meaningfully to any test of the unitarity of the Cabibbo-Kobayashi-Maskawa (CKM) matrix, the measured ft value of a superallowed 0(+)-> 0(+) beta(+) transition must be obtained to a precision of 0.1% or better. ...
Precise half-life measurement of the superallowed beta(+) emitter (26)Si
(American Physical Society, 2010)
We measured the half-life of the superallowed 0(+) -> 0(+) beta(+) emitter (26)Si to be 2245.3(7) ms. We used pure sources of (26)Si and employed a high-efficiency gas counter, whichwas sensitive to positrons from both ...