Title :
Multi-element CdZnTe detectors for gamma ray detection and imaging
Author :
Bennett, P.R. ; Shah, K.S. ; Cirignano, L.J. ; Klugerman, M.B. ; Dmitryev, Y.N. ; Squillante, M.R.
Author_Institution :
Radiat. Monitoring Devices Inc., Watertown, MA, USA
Abstract :
A small pixellated gamma-ray detector has been constructed from a 5 mm thick CdZnTe substrate and characterized 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 FWHM. 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 scanned sources incident on the anode face showed good agreement with the pixel geometry and an undetectable amount of dependence on interaction depth
Keywords :
gamma-ray detection; gamma-ray spectrometers; position sensitive particle detectors; semiconductor counters; semiconductor device noise; 5 mm; CdZnTe; CdZnTe detectors; anode design; electronic noise; energy resolution; interaction depth; pixellated gamma-ray detector; pixels; spatial response; Anodes; Displays; Energy resolution; Gamma ray detection; Gamma ray detectors; Geometry; Optical imaging; Performance analysis; Spectroscopy; Testing;
Conference_Titel :
Nuclear Science Symposium, 1997. IEEE
Conference_Location :
Albuquerque, NM
Print_ISBN :
0-7803-4258-5
DOI :
10.1109/NSSMIC.1997.672645
