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

fYear

1997

fDate

9-15 Nov 1997

Firstpage

561

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;

fLanguage

English

Publisher

ieee

Conference_Titel

Nuclear Science Symposium, 1997. IEEE

Conference_Location

Albuquerque, NM

ISSN

1082-3654

Print_ISBN

0-7803-4258-5

Type

conf

DOI

10.1109/NSSMIC.1997.672645

Filename

672645