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

Kód výsledku v 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>

Výsledek na webu

<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>

Jazyk výsledku

angličtina

Název v původním jazyce

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

Popis výsledku v původním jazyce

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.

Název v anglickém jazyce

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

Popis výsledku anglicky

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.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10302 - Condensed matter physics (including formerly solid state physics, supercond.)

Projekt

<a href="/cs/project/GA19-11920S" target="_blank" >GA19-11920S: Transport náboje v pixelových detektorech záření CdZnTe</a><br>

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Rok uplatnění

2023

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

Scientific Reports

ISSN

2045-2322

e-ISSN

—

Svazek periodika

13

Číslo periodika v rámci svazku

1

Stát vydavatele periodika

GB - Spojené království Velké Británie a Severního Irska

Počet stran výsledku

13

Strana od-do

3212

Kód UT WoS článku

000942280900008

EID výsledku v databázi Scopus

2-s2.0-85148965519