Precision Half-life Measurement of $^{25}$Al

In recent years, precision measurements have led to considerable advances in several areas of physics, including fundamental symmetry. Precise determination of $ft$ values for superallowed mixed transitions between mirror nuclides could provide an avenue to test the theoretical corrections used to extract the V$_{ud}$ matrix element from superallowed pure Fermi transitions. Calculation of the $ft$ value requires the half-life, branching ratio, and Q value. $^{25}$Al decay is of particular interest as its half-life is derived from a series of conflicting measurements, and the largest uncertainty on the $ft$ value stems from the half-life uncertainty. The life-time was determined by the $\beta$ counting of implanted $^{25}$Al on a Ta foil that was removed from the beam for counting. The $^{25}$Al beam was produced by a transfer reaction and separated by the TwinSol facility of the Nuclear Science Laboratory of the University of Notre Dame. The $^{25}$Al results will be presented with preliminary results of more recent half-life measurements.