Precision half-life measurement of Al25
AbstractA new precision half-life measurement of Al25 was conducted using the TwinSol β-counting station at the University of Notre Dame. The new measured value of t1/2new=7.1657(24) s is in good agreement with the most recent measurement, while being 3 times more precise. Using these new measurements, an evaluation of the Al25 half-life has been performed, leading to an average half-life of t1/2world=7.1665(26) s, which is 5 times more precise than it's predecessor and has a more satisfactory Birge ratio of 1.1. To aid in future measurements of correlation parameters, a new Fermi to Gamow-Teller mixing ratio ρ and correlation parameters for this mixed transition have been calculated assuming the standard model validity using the new world half-life.