Development of an orthogonal-stripe CdZnTe gamma radiation imaging spectrometer

We report performance measurements of a sub-millimeter resolution CdZnTe strip detector developed as a prototype for astronomical instruments operating with good efficiency in the 30-300 keV photon energy range. The prototype is a 1.4 mm thick, 64/spl times/64 contact stripe CdZnTe array of 0.375 mm...

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Bibliographic Details
Published in:IEEE transactions on nuclear science 1996-06, Vol.43 (3), p.1458-1462
Main Authors: Macri, J.R., Apotovsky, B.A., Butler, J.F., Cherry, M.L., Dann, B.K., Drake, A., Doty, F.P., Guzik, T.G., Larson, K., Mayer, M., McConnell, M.L., Ryan, J.M.
Format: Article
Language:English
Subjects:
Collimators
Detectors
Energy resolution
Gamma rays
Image segmentation
Instruments
Measurement
Optical imaging
Prototypes
Spatial resolution
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Summary:We report performance measurements of a sub-millimeter resolution CdZnTe strip detector developed as a prototype for astronomical instruments operating with good efficiency in the 30-300 keV photon energy range. The prototype is a 1.4 mm thick, 64/spl times/64 contact stripe CdZnTe array of 0.375 mm pitch in both dimensions. Pulse height spectra were recorded in orthogonal-stripe coincidence mode which demonstrate room-temperature energy resolution 5:1. Good response is also demonstrated at higher energies using a coplanar grid readout configuration. Spatial resolution capabilities finer than the stripe pitch are demonstrated. We present the image of a /sup 133/Ba source viewed through a collimator slit produced by a 4/spl times/4 stripe detector segment. Charge signals from electron and hole collecting contacts are also discussed.
ISSN:0018-9499
1558-1578
DOI:10.1109/23.507083