  The Gamma-Ray Infrastructure For Fundamental Investigations of Nuclei,
GRIFFIN, is a new experimental facility for radioactive decay studies at the
TRIUMF-ISAC laboratory. The performance of the 16 high-purity germanium (HPGe)
clover detectors that will make up the GRIFFIN spectrometer is reported. The
energy resolution, efficiency, timing resolution, crosstalk and preamplifier
properties of each crystal were measured using a combination of analogue and
digital data acquisition techniques. The absolute efficiency and add-back
factors are determined for the energy range of 80 - 3450 keV. The detectors
show excellent performance with an average over all 64 crystals of a FWHM
energy resolution of 1.89(6) keV and relative efficiency with respect to a
3"x3" NaI detector of 41(1)% at 1.3 MeV.
