High-precision half-life measurement of the beta(+) decay of Na-21 Academic Article uri icon


  • 2018 American Physical Society. The + decay of Na21 to Ne21 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 Na21 have not been consistent with one another. We report here a new measurement of the half-life: 22.46150.0039(stat)0.00150.0001(syst)s. This result increases the world average of the Na21 half-life by 0.0048 s and reduces the uncertainty by a factor of 1.5.

published proceedings


author list (cited authors)

  • Shidling, P. D., Behling, R. S., Fenker, B., Hardy, J. C., Iacob, V. E., Mehlman, M., ... Melconian, D.

citation count

  • 3

complete list of authors

  • Shidling, PD||Behling, RS||Fenker, B||Hardy, JC||Iacob, VE||Mehlman, M||Park, HI||Roeder, BT||Melconian, D

publication date

  • July 2018