Study of characteristics of CdZnTe detector

Gurov, Yurij Borisovič; Egorov, Nikita; Ponomarev, Dmitry; Rozov, S.; Sandukovsky, V. G.; Shakhov, K. V.; Yakushev, E.; Zhivun, V. M.

doi:10.1088/1748-0221/14/11/p11002

Cited by 6 publications

(4 citation statements)

References 7 publications

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“…Section 3 presents the architecture and properties of the designed scanner with synthetic data as well as reconstructions. The validation of our approach with the properties of the LBC:Ce scintillators motivates the potential of the imaging system in particular with better resolved crystals or semiconductor detectors such as CZT (CdZnTe) [37].…”

Section: Introductionmentioning

confidence: 85%

Modeling and Reconstruction Strategy for Compton Scattering Tomography with Scintillation Crystals

Kuger

Rigaud

2021

Crystals

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The recent development of energy-resolved scintillation crystals opens the way to build novel imaging concepts based on the variable energy. Among them, Compton scattering tomography (CST) is one of the most ambitious concepts. Akin to Computerized Tomography (CT), it consists in probing the attenuation map of an object of interest using external ionizing sources but strives to exploit the scattered radiation as an imaging agent. For medical applications, the scattered radiation represents 70 to 80% when the energy of the source is larger than 100 keV and results from the Compton effect. This phenomenon stands for the collision of a photon with an electron and rules the change of course and loss of energy undergone by the photon. In this article, we propose a modeling for the scattered radiation assuming polychromatic sources such as 60Co and scintillation crystals such as LBC:Ce. Further, we design a general strategy for reconstructing the electron density of the target specimen. Our results are illustrated for toy objects.

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Section: Introductionmentioning

confidence: 85%

Modeling and Reconstruction Strategy for Compton Scattering Tomography with Scintillation Crystals

Kuger

Rigaud

2021

Crystals

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“…Two of the detector materials that are of particular interest for PCDs are CdTe or CdZnTe (CZT) due to characteristics such as a high effective atomic number, high band gap, high charge carrier mobility, and a low energy for electron-hole creation [16]. CZT is already being investigated for use in NDT, such as for determining the absolute density of products like wood panels and ceramic tiles [8].…”

Section: Introductionmentioning

confidence: 99%

Contaminant detection in non-destructive testing using a CZT photon-counting detector

et al. 2021

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“…Cd 1−x Zn x Te (0 ≤ x ≤ 0.1) (CZT) semiconductors, having an energy gap greater than 1.4 eV, are important in the manufacture of X-ray and gamma detectors (γ) [ 1 , 2 ], and because they can operate at room temperature, they present advantages compared to those of Si or Ge that require operating temperatures between 77 and 150 K. The compounds are also used as a substrate for the growth of epitaxial films sensitive to IR radiation [ 3 , 4 ].…”

Section: Introductionmentioning

confidence: 99%

Crystalline Quality, Composition Homogeneity, Tellurium Precipitates/Inclusions Concentration, Optical Transmission, and Energy Band Gap of Bridgman Grown Single-Crystalline Cd1−xZnxTe (0 ≤ x ≤ 0.1)

et al. 2021

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Cd1−xZnxTe (0 ≤ x ≤ 0.1) ingots were obtained by Bridgman’s method using two different speeds in order to find the optimal conditions for single-crystalline growth. Crystalline quality was studied by chemical etching, the elemental composition by wavelength dispersive spectroscopy (WDS), tellurium (Te) precipitates/inclusions concentration by differential scanning calorimetry (DSC), optical transmission by Fourier transformed infrared spectrometry (FTIR), and band gap energy (Egap) by photoluminescence (PL). It was observed that the ingots grown at a lower speed were those of the best crystalline quality, having at most three grains of different crystallographic orientation. The average dislocations density in all of them were similar and correspond to materials of good quality. EPMA results indicated that the homogeneity in the composition was excellent in the ingots central part. The concentration of Te precipitates/inclusions in all ingots was below the instrument (DSC) detection limit, 0.25% wt/wt. In the case of wafers from Cd0.96Zn0.04Te and Cd0.90Zn0.10Te ingots, the optical transmission was better than that of commercial materials and varied between 60% and 70%, while for pure CdTe, the transmission range was between 50% and 55%, the latter being decreased by the presence of Te precipitates/inclusions. The band gap energy Eg of different wafers was experimentally obtained by PL measurements at 76 K. We observed that Eg increased with the Zn concentration of the wafers, following a linear regression comparable to those proposed in the literature, and consistent with the results obtained with other techniques.

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Study of characteristics of CdZnTe detector

Cited by 6 publications

References 7 publications

Modeling and Reconstruction Strategy for Compton Scattering Tomography with Scintillation Crystals

Modeling and Reconstruction Strategy for Compton Scattering Tomography with Scintillation Crystals

Contaminant detection in non-destructive testing using a CZT photon-counting detector

Crystalline Quality, Composition Homogeneity, Tellurium Precipitates/Inclusions Concentration, Optical Transmission, and Energy Band Gap of Bridgman Grown Single-Crystalline Cd1−xZnxTe (0 ≤ x ≤ 0.1)

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