High-Precision Half-life Measurement for the Superallowed Fermi $\beta^+$ Emitter $^{22}$Mg

Authors :: Dunlop, M. R.
Svensson, C. E.
Ball, G. C.
Leslie, J. R.
Andreoiu, C.
Bernier, N.
Bidaman, H.
Bildstein, V.
Bowry, M.
Burbadge, C.
Caballero-Folch, R.
Varela, A. Diaz
Dunlop, R.
Garnsworthy, A. B.
Garrett, P. E.
Hackman, G.
Jigmeddorj, B.
Leach, K. G.
MacLean, A. D.
Olaizola, B.
Measures, J.
Natzke, C.
Saito, Y.
Smith, J. K.
Turko, J.
Zidar, T.
Publication Year :: 2017
Abstract: A high-precision half-life measurement for the superallowed Fermi $\beta^+$ emitter $^{22}$Mg was performed at the TRIUMF-ISAC facility using a 4$\pi$ proportional gas counter. The result of $T_{1/2} = 3.87400 \pm 0.00079$ s is a factor of 3 more precise than the previously adopted world average and resolves a discrepancy between the two previously published $^{22}$Mg half-life measurements.<br />Comment: 7 pages, 9 figures

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