Spectroscopic studies of neutron-rich In129 and its β -decay daughter, Sn129 , using the GRIFFIN spectrometer

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