Characterization of large single-crystal gamma-ray detectors of cadmium zinc telluride

Cadmium Zinc Telluride (CdZnTe) single crystals have been widely ultilized in various photoelectron devices such as radiation detectors and solar cells. Different types of ordered phases have also been investigated...

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Recent advances in the development of high-resolution 3D cadmium–zinc–telluride drift strip detectors

Journal of Synchrotron Radiation ◽

10.1107/s1600577520010747 ◽

2020 ◽

Vol 27 (6) ◽

pp. 1564-1576

Author(s):

Leonardo Abbene ◽

Gaetano Gerardi ◽

Fabio Principato ◽

Antonino Buttacavoli ◽

Saverio Altieri ◽

...

Keyword(s):

High Resolution ◽

Room Temperature ◽

Gamma Ray ◽

Cadmium Zinc Telluride ◽

Zinc Telluride ◽

Strip Detectors ◽

Correction Technique ◽

Wide Range ◽

Induced Charge ◽

Cadmium Zinc

In the last two decades, great efforts have been made in the development of 3D cadmium–zinc–telluride (CZT) detectors operating at room temperature for gamma-ray spectroscopic imaging. This work presents the spectroscopic performance of new high-resolution CZT drift strip detectors, recently developed at IMEM-CNR of Parma (Italy) in collaboration with due2lab (Italy). The detectors (19.4 mm × 19.4 mm × 6 mm) are organized into collecting anode strips (pitch of 1.6 mm) and drift strips (pitch of 0.4 mm) which are negatively biased to optimize electron charge collection. The cathode is divided into strips orthogonal to the anode strips with a pitch of 2 mm. Dedicated pulse processing analysis was performed on a wide range of collected and induced charge pulse shapes using custom 32-channel digital readout electronics. Excellent room-temperature energy resolution (1.3% FWHM at 662 keV) was achieved using the detectors without any spectral corrections. Further improvements (0.8% FWHM at 662 keV) were also obtained through a novel correction technique based on the analysis of collected-induced charge pulses from anode and drift strips. These activities are in the framework of two Italian research projects on the development of spectroscopic gamma-ray imagers (10–1000 keV) for astrophysical and medical applications.

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On the Active Volume of Cadmium Zinc Telluride Gamma-Ray Spectrometers

MRS Proceedings ◽

10.1557/proc-487-199 ◽

1997 ◽

Vol 487 ◽

Cited By ~ 1

Author(s):

J. C. Lund ◽

B. A. Brunett ◽

T. P. Viles ◽

N. R. Hilton ◽

R. B. James

Keyword(s):

Gamma Ray ◽

Cadmium Zinc Telluride ◽

Pulse Height ◽

Zinc Telluride ◽

Charge Trapping ◽

Active Volume ◽

Electronic Signal Processing ◽

Czt Detectors ◽

Unipolar Devices ◽

Cadmium Zinc

AbstractIn this paper we develop quantitative models to predict the active volume of cadmium zinc telluride (CZT) detectors operated as gamma-ray pulse height spectrometers. Three cases are considered: a conventional planar detector, a unipolar device, and a detector in which electronic signal processing has been applied to correct for charge trapping effects. We find that existing detectors are very limited in their maximum attainable active volume, but unipolar devices with charge correction show promise for producing large active volume devices.

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