Superallowed Fermi β-Decay Studies with SCEPTAR and the 8π Gamma-Ray Spectrometer

Details Superallowed Fermi β-Decay Studies with SCEPTAR and the 8π Gamma-Ray Spectrometer Superallowed Fermi β-Decay Studies with SCEPTAR and the 8π Gamma-Ray Spectrometer

Apr 2005

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2005fuin.conf..210k&link_type=abstract

FUNDAMENTAL INTERACTIONS. Proceedings of the Nineteenth Lake Louise Winter Institute. Held 15-21 February 2004 in Lake Louise, A

Physics

Scientific paper

The 8π Gamma-Ray Spectrometer, operating at TRIUMF in Vancouver Canada, is a high-precision instrument for detecting the decay radiations from exotic nuclei. In 2003, a new beta-scintillating array called SCEPTAR was installed within the 8π Spectrometer. With these two systems, precise measurements of half-lives and branching ratios can be made, specifically on certain nuclei which exhibit Superallowed Fermi 0+ → 0+ β-decay. These data can be used to determine the value of δC, an isospin symmetry-breaking (Coulomb) correction factor to good precision. As this correction factor is currently one of the leading sources of error in the unitarity test of the CKM matrix, a precise determination of its value could help to eliminate any possible "trivial" explanation of the seeming departure of current experimental data from Standard Model predictions.

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