High-precision branching-ratio measurement for the superallowed β+ emitter $^{26}$Al$^{m}$

P. Finlay G.C. Ball J.R. Leslie C.E. Svensson C. Andreoiu R.A.E. Austin D. Bandyopadhyay D.S. Cross G. Demand M. Djongolov S. Ettenauer P.E. Garrett K.L. Green G.F. Grinyer 1 G. Hackman K.G. Leach C.J. Pearson A.A. Phillips E.T. Rand C.S. Sumithrarachchi S. Triambak S.J. Williams
1 GANIL - Grand Accélérateur National d'Ions Lourds
Abstract : A high-precision branching-ratio measurement for the superallowed β + emitter 26Alm was performed at the TRIUMF-ISAC radioactive ion beam facility. An upper limit of 12 ppm at 90% confidence level was found for the second forbidden β + decay of 26Alm to the 2+ 1 state at 1809 keV in 26Mg. An inclusive upper limit of 15 ppm at 90% confidence level was found when considering all possible nonanalog β + /EC decay branches of 26Alm, resulting in a superallowed branching ratio of 100.0000+0 −0.0015%.
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Physical Review C, American Physical Society, 2012, 85, pp.055501. <10.1103/PhysRevC.85.055501>
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http://hal.in2p3.fr/in2p3-00702722
Contributeur : Michel Lion <>
Soumis le : jeudi 31 mai 2012 - 11:06:38
Dernière modification le : vendredi 11 septembre 2015 - 09:55:38

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P. Finlay, G.C. Ball, J.R. Leslie, C.E. Svensson, C. Andreoiu, et al.. High-precision branching-ratio measurement for the superallowed β+ emitter $^{26}$Al$^{m}$. Physical Review C, American Physical Society, 2012, 85, pp.055501. <10.1103/PhysRevC.85.055501>. <in2p3-00702722>

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