High-statistics $\beta $-decay Measurements at TRIUMF-ISAC and the Transition from the $8\pi $ Spectrometer to GRIFFIN

Over a 12 year period, the 8 pi gamma-ray spectrometer at the TRIUMF-ISAC facility was a world unique device for beta-decay studies. Equipped with a variety of auxiliary devices, it was used in studies of Fermi superallowed beta(+) emitters, and nuclear structure studies far from stability and those employing high-statistics measurements. In the present contribution, this latter use is highlighted with examples of recent data obtained in the decay of Cs-122 to Xe-122. The 8 pi spectrometer was replaced with the much more powerful GRIFFIN facility in 2014, ensuring world-leading capability for gamma-ray spectroscopy following beta decay at TRIUMF-ISAC for the next generation. Examples that highlight GRIFFIN's capabilities are given.