Precise measurements of half-lives and branching ratios for the beta mirror 
transitions in the decay of Mg-23 and Si-27

Magron, C.; Alfaurt, Ph.; Blank, B.; Daudin, L.; Eronen, T.; Gerbaux, M.; Giovinazzo, J.; Gorelov, D.; Grevy, S.; Guerin, H.; Hakala, J.; Kolhinen, V. S.; Koponen, J.; Nieto, T. Kurtukian; Moore, I. D.; Penttila, H.; Pohjalainen, I.; Reinikainen, J.; Reponen, M.; Rinta-Antila, S.; Roche, M.; de Roubin, Antoine; Smirnova, N.; Thomas, B.; Voss, A.; Xayavong, L.

doi:10.1140/epja/i2017-12271-0

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Precise measurements of half-lives and branching ratios for the beta mirror transitions in the decay of Mg-23 and Si-27

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de Roubin, Antoine
Division Prof. Dr. Klaus Blaum, MPI for Nuclear Physics, Max Planck Society;

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Citation

Magron, C., Alfaurt, P., Blank, B., Daudin, L., Eronen, T., Gerbaux, M., et al. (2017). Precise measurements of half-lives and branching ratios for the beta mirror transitions in the decay of Mg-23 and Si-27. European Physical Journal A, 53(4): 77. doi:10.1140/epja/i2017-12271-0.

Cite as: https://hdl.handle.net/21.11116/0000-0000-CC53-D

Abstract

Half-lives and branching ratios for the two mirror beta decays of Mg-23 and Si-27 have been measured at the University of Jyv " askyl " a with the IGISOL facility. The results obtained, T-1/2 = 11.303(3) s and T-1/2 = 4.112(2) s for the half-lives of Mg-23 and Si-27, respectively, are 7 and 8 times more precise than the averages of previous measurements. The values obtained for the super-allowed branching ratios of Mg-23 and Si-27 are B.R. = 92.18(8)% and B.R. = 99.74(2)%, respectively. The result for Mg-23 is three times more precise than the average of the previous measurements, while for Si-27 the precision has not been improved, the average of the previous measurements being already very precise. Isospin-symmetry-breaking corrections have been calculated for the two nuclei to determine the corrected Ft value.