Superallowed beta decay studies at TRIUMF -nuclear structure and fundamental symmetries

Precision measurement of the β-decay half-life, Q-value, and branching ratio between nuclear analog states of J^π = 0⁺ and T = 1 can provide critical and fundamental tests of the Standard Model's description of electroweak interactions. A program has been initiated at TRIUMF-ISAC to measure the ft values of these superallowed beta transitions. Two Tz = 0, A > 60 cases, ⁷⁴Rb and ⁶²Ga, are presented. These are particularly relevant because they …