Branching ratios for the beta decay of 21Na

Details Branching ratios for the beta decay of 21Na Branching ratios for the beta decay of 21Na

2006-08-16

arxiv.org/abs/nucl-ex/0608032v1

Phys.Rev.C74:015501,2006; Erratum-ibid.C74:029901,2006

Physics

Nuclear Physics

Nuclear Experiment

Revtex4, 2 figs

Scientific paper

10.1103/PhysRevC.74.015501

We have measured the beta-decay branching ratio for the transition from 21Na to the first excited state of 21Ne. A recently published test of the standard model, which was based on a measurement of the beta-nu correlation in the decay of 21Na, depended on this branching ratio. However, until now only relatively imprecise (and, in some cases, contradictory) values existed for it. Our new result, 4.74(4)%, reduces but does not remove the reported discrepancy with the standard model.

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