Possibilities of Uses of a CZT Detector in Security Applications

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F86652052%3A_____%2F21%3AN0000029" target="_blank" >RIV/86652052:_____/21:N0000029 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/60460709:41110/21:89442

Výsledek na webu

<a href="https://www.taylorfrancis.com/chapters/edit/10.1201/9781003218364-9/possibilities-uses-czt-detector-security-applications-anna-selivanova-lubom%C3%ADr-gryc-jan-helebrant" target="_blank" >https://www.taylorfrancis.com/chapters/edit/10.1201/9781003218364-9/possibilities-uses-czt-detector-security-applications-anna-selivanova-lubom%C3%ADr-gryc-jan-helebrant</a>

DOI - Digital Object Identifier

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Jazyk výsledku

angličtina

Název v původním jazyce

Possibilities of Uses of a CZT Detector in Security Applications

Popis výsledku v původním jazyce

Owing to increasing risks of terrorism, new detection systems able to reveal hidden radioactive sources in luggage or radiological dispersal devices (dirty bombs) are being developed. Due to good spectrometric properties and undemanding operation at room temperature, semiconductor detectors based on CdTe/CdZnTe (CZT) compounds seem to be convenient in these security applications. Therefore, a small CZT detector was selected and tested as a potential spectrometric device. Anticipating location of the detection system in public spaces or social events (e.g., airports, stations, exhibitions or concerts) and possible threats, point sources were assumed at different distances from the CZT detector. In order to test relevant geometries, several sets of Monte Carlo simulations and measurements were prepared. A mathematical model of the CZT detector was adopted from the preceding research. Within the simulations, full energy peak (FEP) efficiency calibrations were obtained, as well as background spectra containing natural radionuclides. Using simulated FEP efficiencies and background spectra, minimum detectable activities (MDA) were calculated. Moreover, in order to test the CZT detector in conditions, where persons with residual activities in bodies (e.g., after nuclear treatments) are measured, male and female phantoms with volume radioactive sources homogeneously distributed in organs were used. Based on the Monte Carlo simulations, experiments with the CZT detector and small standard sources were carried out in real conditions. Results obtained from measurements demonstrated good agreement with simulations.

Název v anglickém jazyce

Possibilities of Uses of a CZT Detector in Security Applications

Popis výsledku anglicky

Owing to increasing risks of terrorism, new detection systems able to reveal hidden radioactive sources in luggage or radiological dispersal devices (dirty bombs) are being developed. Due to good spectrometric properties and undemanding operation at room temperature, semiconductor detectors based on CdTe/CdZnTe (CZT) compounds seem to be convenient in these security applications. Therefore, a small CZT detector was selected and tested as a potential spectrometric device. Anticipating location of the detection system in public spaces or social events (e.g., airports, stations, exhibitions or concerts) and possible threats, point sources were assumed at different distances from the CZT detector. In order to test relevant geometries, several sets of Monte Carlo simulations and measurements were prepared. A mathematical model of the CZT detector was adopted from the preceding research. Within the simulations, full energy peak (FEP) efficiency calibrations were obtained, as well as background spectra containing natural radionuclides. Using simulated FEP efficiencies and background spectra, minimum detectable activities (MDA) were calculated. Moreover, in order to test the CZT detector in conditions, where persons with residual activities in bodies (e.g., after nuclear treatments) are measured, male and female phantoms with volume radioactive sources homogeneously distributed in organs were used. Based on the Monte Carlo simulations, experiments with the CZT detector and small standard sources were carried out in real conditions. Results obtained from measurements demonstrated good agreement with simulations.

Druh

C - Kapitola v odborné knize

CEP obor

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OECD FORD obor

20305 - Nuclear related engineering; (nuclear physics to be 1.3);

Projekt

<a href="/cs/project/VI20172020104" target="_blank" >VI20172020104: Nová generace portálových monitorů pro zajištění bezpečnosti obyvatelstva (PoMoZ)</a><br>

Návaznosti

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

Rok uplatnění

2021

Kód důvěrnosti údajů

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

Název knihy nebo sborníku

Radiation Detection Systems

ISBN

978-1032110875

Počet stran výsledku

30

Strana od-do

219 – 248

Počet stran knihy

310

Název nakladatele

CRC Press

Místo vydání

Boca Raton

Kód UT WoS kapitoly

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