β and γ rays following the decay of 129Cd were detected with the GRIFFIN spectrometer comprising the plastic scintillator SCEPTAR and 16 high-purity germanium (HPGe) clover-type detectors. From the ß−γ−γ coincidence analysis, 32 new transitions and seven new excited states were established, expanding the previously known level scheme of 129In. The log ft values deduced from the
β -feeding intensities suggest that some of the high-lying states were populated by the ν0g7/2→π0g9/2 allowed Gamow-Teller (GT) transition, which indicates that the allowed GT transition is more dominant in the 129Cd decay than previously reported. Observation of fragmented Gamow-Teller strengths is consistent with theoretical calculations.