Optimization of quasi-hemispherical CdZnTe detectors by means of first principles simulation

Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216208%3A11320%2F23%3A10473160" target="_blank" >RIV/00216208:11320/23:10473160 - isvavai.cz</a>
Result on the web
<a href="https://verso.is.cuni.cz/pub/verso.fpl?fname=obd_publikace_handle&handle=EHaSmrFvtz" target="_blank" >https://verso.is.cuni.cz/pub/verso.fpl?fname=obd_publikace_handle&handle=EHaSmrFvtz</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1038/s41598-023-30181-2" target="_blank" >10.1038/s41598-023-30181-2</a>

Result language
angličtina
Original language name
Optimization of quasi-hemispherical CdZnTe detectors by means of first principles simulation
Original language description
In this paper we present the development of quasi-hemispherical gamma-ray detectors based on CdZnTe. Among the possible single-polarity electrode configurations, such as coplanar, pixelated, or virtual Frisch-grid geometries, quasi-hemispherical detectors are the most cost-effective alternative with comparable raw energy resolution in the high and low energy range. The optimal configuration of the sensor in terms of dimension of the crystals and electrode specifications has been first determined by simulations, and successively validated with experimental measures. Spectra from different sources have been acquired to evaluate the detectors performances. Three types of detectors with different CZT volumes have been fabricated, namely 10 x 10 x 5 mm(3), 15 x 15 x 10 mm(3) and 20 x 20 x 10 mm(3). In the case of 10 x 10 x 5 mm(3) crystals, the optimum pixel size determined by our simulation tool was confirmed by experiments: the best spectroscopic resolution of 1.3% at 662 keV has been found for a 750 µm diameter pixel detector. The best energy resolution values obtained for the 15 x 15 x 10 mm(3) and 20 x 20 x 10 mm(3) detectors were respectively 1.7% and 2.7% at 662 keV.
Czech name
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Czech description
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Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
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OECD FORD branch
10302 - Condensed matter physics (including formerly solid state physics, supercond.)

Project
<a href="/en/project/GA19-11920S" target="_blank" >GA19-11920S: Charge transport in pixelated CdZnTe radiation detectors</a><br>
Continuities
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Publication year
2023
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

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