NEW SETUP FOR A POSITION-SENSITIVE GAMMA-RAY DETECTOR

We present experimental results about a position-sensitive gamma detec tor with a diameter of 75 mm, a position resolution of 3.5 mm, and a g ood linearity for 662 keV gamma rays using a NaI or plastic scintillat or. The detector is designed to solve some of the Anger camera's reado ut problems and to be as close as possible to the sample in a 90-degre es perturbed angular correlation experiment. It might substitute up to 100 smaller detectors with the same angular resolution or could cover 70% of the 4pi geometry in crystal ball experiments. The setup allows easy and fast signal processing in angular correlation experiments du e to the use of point symmetry in the experiment as well as in data an alysis.