High-precision half-life measurement of the ß+ decay of 21Na.

Authors :: Shidling, P. D.
Behling, R. S.
Fenker, B.
Hardy, J. C.
Iacob, V. E.
Mehlman, M.
Park, H. I.
Roeder, B. T.
Melconian, D.
Source :: Physical Review C. Jul2018, Vol. 98 Issue 1, p1-1. 1p.
Publication Year :: 2018
Abstract: The β+ decay of 21Na to 21Ne is one of the four cases currently being used to determine the value of Vud from nuclear mirror (T=1/2) transitions. To date, published values for the half-life of 21Na have not been consistent with one another. We report here a new measurement of the half-life: 22.4615±0.0039(stat)±0.00010.0015(syst)s. This result increases the world average of the 21Na half-life by 0.0048 s and reduces the uncertainty by a factor of 1.5. [ABSTRACT FROM AUTHOR]