Precision half-life measurement of 25Al.

Authors :: Long, J.
Ahn, T.
Allen, J.
Bardayan, D. W.
Becchetti, F. D.
Blankstein, D.
Brodeur, M.
Burdette, D.
Frentz, B.
Hall, M. R.
Kelly, J. M.
Kolata, J. J.
O'Malley, P. D.
Schultz, B. E.
Strauss, S. Y.
Valverde, A. A.
Source :: Physical Review C. Jul2017, Vol. 96 Issue 1, p1-1. 1p.
Publication Year :: 2017
Abstract: A new precision half-life measurement of 25Al 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 25Al 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. [ABSTRACT FROM AUTHOR]