DETECTORS AND DETECTION LIMITS IN INAA - II - IMPROVEMENTS IN DETECTION LIMITS WITH LARGE GE-DETECTORS, WELL-TYPE GE-DETECTORS AND ANTI-COMPTON SPECTROMETERS

Detection limit improvement factors have been calculated to predict th e improvement in detection limiter when replacing a traditional 20% co axial detector by either a 100% coaxial detector, a well-type detector or by equipping the detector with a Compton suppression shield. It is shown that, when measuring sources on the end-cap of the detector, a system with a Compton suppression shield and a 100% detector have almo st equal potentials. put when e.g. geometrical consideration larger so urce-to-end-cap distances are required with coaxial detectors, the wel l-type detector offers the best outlook for attaining better detection limits. The calculated predictions have been compared with experiment al observations and the results agree well.