Precise half-life measurement of the superallowed beta(+) emitter Si-26
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We measured the half-life of the superallowed 0+0 + + emitter Si26 to be 2245.3(7) ms. We used pure sources of Si26 and employed a high-efficiency gas counter, which was sensitive to positrons from both this nuclide and its daughter Al26m. The data were analyzed as a linked parent-daughter decay. To contribute meaningfully to any test of the unitarity of the Cabibbo-Kobayashi-Maskawa (CKM) matrix, the ft value of a superallowed transition must be determined to a precision of 0.1% or better. With a precision of 0.03%, the present result is more than sufficient to be compatible with that requirement. Only the branching ratio now remains to be measured precisely before a 0.1% ft value can be obtained for the superallowed transition from Si26. 2010 The American Physical Society.
author list (cited authors)
Iacob, V. E., Hardy, J. C., Banu, A., Chen, L., Golovko, V. V., Goodwin, J., ... Tribble, R. E.
complete list of authors
Iacob, VE||Hardy, JC||Banu, A||Chen, L||Golovko, VV||Goodwin, J||Horvat, V||Nica, N||Park, HI||Trache, L||Tribble, RE