Title :
Multi-element CdZnTe detectors for gamma ray detection and imaging
Author :
Bennett, P.R. ; Shah, K.S. ; Cirignano, L.J. ; Klugerman, M.B. ; Dmitriyev, Y.N. ; Squillante, M.R.
Author_Institution :
Radiat. Monitoring Devices Inc., Watertown, MA, USA
fDate :
6/1/1998 12:00:00 AM
Abstract :
A small pixellated gamma-ray detector has been constructed from a 5 mm thick CdZnTe substrate and for spectroscopic and spatial properties. Emphasis has been placed on revealing “pixel-level” results to further understand optimum array design and operation. The anode design is (1.5×1.5) mm2 pixels on a 1.625 mm pitch. Spectroscopic results with a 57Co source display an average energy resolution of 3.9 keV FHWM. Analysis of the electronic noise for different pixels showed good agreement with a theoretical model, and similar performance between edge and interior pixels. A test of spatial response with incident radiation scanned across the anode face show good agreement with the pixel geometry and an undetectable amount of dependance on interaction depth
Keywords :
II-VI semiconductors; cadmium compounds; gamma-ray detection; semiconductor counters; wide band gap semiconductors; zinc compounds; CdZnTe; anode face; electronic noise; energy resolution; gamma ray detection; interaction depth; multi-element CdZnTe detectors; optimum array design; pixel geometry; pixellated gamma-ray detector; Anodes; Displays; Energy resolution; Gamma ray detection; Gamma ray detectors; Geometry; Optical imaging; Performance analysis; Spectroscopy; Testing;
Journal_Title :
Nuclear Science, IEEE Transactions on
