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; G. Hackman; K.G. Leach; C.J. Pearson; A.A. Phillips; E.T. Rand; C.S. Sumithrarachchi; S. Triambak; S.J. Williams

doi:10.1103/PhysRevC.85.055501

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%.

Document type :

Journal articles

Physical Review C, American Physical Society, 2012, 85, pp.055501. <10.1103/PhysRevC.85.055501>

Domain :

Physics / Nuclear Experiment

http://hal.in2p3.fr/in2p3-00702722
Contributor : Michel Lion <>
Submitted on : Thursday, May 31, 2012 - 11:06:38 AM
Last modification on : Thursday, May 31, 2012 - 11:27:16 AM

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

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