GRETA: Gamma-Ray Energy Tracking Array

The 4π γ-ray tracking array GRETA (Gamma-Ray Energy Tracking Array) will be a powerful instrument needed to accomplish a broad range of experiments that will play an essential role in addressing the intellectual challenges of low-energy nuclear science.  GRETA marks a major advance in the development of γ-ray detector systems and can provide order-of-magnitude gains in sensitivity compared to existing arrays.  It uses highly-segmented hyper-pure germanium crystals together with advanced signal processing techniques to determine the location and energy of individual γ-ray interactions, which are then combined to reconstruct the incident γ-ray in a process called tracking.