High precision branching ratio measurement for the superallowed beta decay of Rb-74: A prerequisite for exacting tests of the standard model Academic Article uri icon


  • Nonanalog Fermi and Gamow-Teller branches in the superallowed decay of [Formula Presented] have been investigated using -ray and conversion-electron spectroscopy. Nine observed transitions, in conjunction with a recent shell model calculation, determine the branching ratio of the analog transition to be 99.5(1)%. The experimental upper limits for the Fermi decay to the [Formula Presented] and [Formula Presented] levels are in agreement with recent theoretical predictions. The [Formula Presented] value for the [Formula Presented] decay is predicted to be 10405(9) keV. 2003 The American Physical Society.

published proceedings


author list (cited authors)

  • Piechaczek, A., Zganjar, E. F., Ball, G. C., Bricault, P., D'Auria, J. M., Hardy, J. C., ... Wood, J. L.

citation count

  • 42

complete list of authors

  • Piechaczek, A||Zganjar, EF||Ball, GC||Bricault, P||D’Auria, JM||Hardy, JC||Hodgson, DF||Iacob, V||Klages, P||Kulp, WD||Leslie, JR||Lipoglavsek, M||Macdonald, JA||Mak, H-B||Moltz, DM||Savard, G||von Schwarzenberg, J||Svensson, CE||Towner, IS||Wood, JL

publication date

  • May 2003