I have heard about 150% or higher relative (compared to 3 inch x 3 inch NaI(Tl) for 1332 keV photons) efficiency HPGe.
I want to know the largest volume or dimensions available for HPGe crystal used in detectors.
I also want to know the highest efficiency available for HPGe detector and its crystal dimensions.
Is the end-cap diameter of HPGe related to its diameter, or is there some standard in which smaller dimensions HPGe crystal are placed?