Title

High precision branching ratio measurement for the superallowed β decay of 74Rb: A prerequisite for exacting tests of the standard model

Document Type

Article

Publication Date

5-1-2003

Abstract

Nonanalog Fermi and Gamow-Teller branches in the superallowed β decay of 74Rb have been investigated using γ-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 02+ and (03+) levels are in agreement with recent theoretical predictions. The QEC value for the 74Rb β decay is predicted to be 10405(9) keV.

Publication Source (Journal or Book title)

Physical Review C - Nuclear Physics

First Page

513051

Last Page

513055

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