Precision Half-life Measurement of $^{29}$P

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. The $^{29}$P decay half-life is derived from a series of measurements of which all are over 35 years old. The life-time was determined by the $\beta$ counting of implanted $^{29}$P on a Ta foil that was removed from the beam for counting. The $^{29}$P 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 progress on the $^{29}$P analysis will be presented.