Gamma-ray Spectroscopic Performance of a $\sim$10 kg Array of High Purity Germanium Crystals*

The gamma-ray spectroscopic performance of a single-cryostat, close-pack array of high purity germanium crystals is presented. The unit design is intended to provide high detection efficiency ($\sim$1000\% relative efficiency) for standoff gamma-ray detection in field measurement applications. However, the array design shares much in common with design concepts proposed by the Majorana Collaboration to search for neutrinoless double beta decay of Ge-76. The presentation will focus on those topics of relevance to both the field application and basic scientific research. Specifically this will include array operation, data collection, and data reduction that elucidate the unique features of a $\sim$10 kg compact array of high purity germanium gamma-ray spectrometers.