  GRETA, the Gamma-Ray Energy Tracking Array, is an array of highly-segmented
HPGe detectors designed to track gamma-rays emitted in beam-physics
experiments. Its high detection efficiency and state-of-the-art position
resolution enable it to reject Compton background and also sequence detected
interactions via Compton kinematics. In this paper, we use simulated photon
tracks to estimate how well interactions can be sequenced in the GRETA
detector. This lays the groundwork for subsequent gamma-ray imaging
applications such as nuclear lifetime measurements.
