  Gamma-Ray Infrastructure For Fundamental Investigations of Nuclei, GRIFFIN,
is a new high-efficiency $\gamma$-ray spectrometer designed for use in decay
spectroscopy experiments with low-energy radioactive ion beams provided by
TRIUMF's Isotope Separator and Accelerator (ISAC-I) facility. GRIFFIN is
composed of sixteen Compton-suppressed large-volume clover-type high-purity
germanium (HPGe) $\gamma$-ray detectors combined with a suite of ancillary
detection systems and coupled to a custom digital data acquisition system. The
infrastructure and detectors of the spectrometer as well as the performance
characteristics and the analysis techniques applied to the experimental data
are described.
