Measurement of the Gamow-Teller Branching Ratio in the $\beta$-Decay of ${21}$Na

Abstract : The beta-decay branching ratio of the GT transition in 21Na to the first excited state in 21Ne has been measured. The value obtained of 4.93(20)% is in agreement with the most recent measurement and with the value adopted so far. This confirms that the branching ratio is not the source of discrepancy in a previous measurement of beta−v correlation coefficient which exhibited a 3sigma difference with respect to the Standard Model prediction.
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Submitted on : Tuesday, March 17, 2009 - 4:30:32 PM
Last modification on : Tuesday, February 19, 2019 - 11:13:19 AM

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N.L. Achouri, J.C. Angélique, G. Ban, B. Bastin, B. Blank, et al.. Measurement of the Gamow-Teller Branching Ratio in the $\beta$-Decay of ${21}$Na. 13th International Symposium on Capture Gamma-Ray Spectroscopy and Related Topics, Aug 2008, Cologne, Germany. pp.362-366, ⟨10.1063/1.3087046⟩. ⟨in2p3-00368796⟩

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