Spectroscopic studies of neutron-rich $^{129}$In and its $β$-decay daughter, $^{129}$Sn, using the GRIFFIN spectrometer

14 Jan 2021 · F. H. Garcia, C. Andreoiu, G. C. Ball, N. Bernier, H. Bidaman, V. Bildstein, M. Bowry, D. S. Cross, M. R. Dunlop, R. Dunlop, A. B. Garnsworthy, P. E. Garrett, J. Henderson, J. Measures, B. Olaizola, K. Ortner, J. Park, C. M. Petrache, J. L. Pore, K. Raymond, J. K. Smith, D. Southall, C. E. Svensson, M. Ticu, J. Turko, K. Whitmore, T. Zidar ·

The $\beta$-decay of neutron-rich $^{129}$In into $^{129}$Sn was studied using the GRIFFIN spectrometer at the ISAC facility at TRIUMF. The study observed the half-lives of the ground state and each of the $\beta$-decaying isomers. The level scheme of $^{129}$Sn has been expanded with thirty-one new $\gamma$-ray transitions and nine new excited levels, leading to a re-evaluation of the $\beta$-branching ratios and level spin assignments. The observation of the $\beta$-decay of the (29/2$^{+}$) 1911-keV isomeric state in $^{129}$In is reported for the first time, with a branching ratio of 2.0(5)$\%$.

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Spectroscopic studies of neutron-rich $^{129}$In and its $β$-decay daughter, $^{129}$Sn, using the GRIFFIN spectrometer

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