Large-volume CdZnTe bar detectors characterized by laser-induced transient currents

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216208%3A11320%2F23%3A10472684" target="_blank" >RIV/00216208:11320/23:10472684 - isvavai.cz</a>

Výsledek na webu

<a href="https://verso.is.cuni.cz/pub/verso.fpl?fname=obd_publikace_handle&handle=8KAJuEcS~z" target="_blank" >https://verso.is.cuni.cz/pub/verso.fpl?fname=obd_publikace_handle&handle=8KAJuEcS~z</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1063/5.0160766" target="_blank" >10.1063/5.0160766</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Large-volume CdZnTe bar detectors characterized by laser-induced transient currents

Popis výsledku v původním jazyce

In this work, we studied the free-carrier transport properties and space-charge formation/polarization in a CdZnTe bar-shaped radiation detector using the Laser-Induced Transient Current technique. We found out that a steady-state space charge ranging from 8 x 10(8) to 2.1 x 10(9) cm(-3) is formed throughout the detector at about 0.5 s following biasing. The measured current waveforms were modeled by Monte Carlo simulations after taking into account the electric and weighting fields inside the detector and shielding box. Modeling of the unpolarized waveforms revealed an exceptionally high electron mobility-lifetime product μ(e)τ(e) &gt;= 0.095 cm(2) V(-1). The observed formation of positive space charge in the biased detector and linear scaling of the current waveform shapes on applied bias revealed that the detector polarization is attributed to carrier injection at the anode. Measurements in pulsed and DC bias in modified electrode geometry proved the surfacecharge formation.

Název v anglickém jazyce

Large-volume CdZnTe bar detectors characterized by laser-induced transient currents

Popis výsledku anglicky

In this work, we studied the free-carrier transport properties and space-charge formation/polarization in a CdZnTe bar-shaped radiation detector using the Laser-Induced Transient Current technique. We found out that a steady-state space charge ranging from 8 x 10(8) to 2.1 x 10(9) cm(-3) is formed throughout the detector at about 0.5 s following biasing. The measured current waveforms were modeled by Monte Carlo simulations after taking into account the electric and weighting fields inside the detector and shielding box. Modeling of the unpolarized waveforms revealed an exceptionally high electron mobility-lifetime product μ(e)τ(e) &gt;= 0.095 cm(2) V(-1). The observed formation of positive space charge in the biased detector and linear scaling of the current waveform shapes on applied bias revealed that the detector polarization is attributed to carrier injection at the anode. Measurements in pulsed and DC bias in modified electrode geometry proved the surfacecharge formation.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10306 - Optics (including laser optics and quantum optics)

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

Journal of Applied Physics

ISSN

0021-8979

e-ISSN

1089-7550

Svazek periodika

134

Číslo periodika v rámci svazku

22

Stát vydavatele periodika

US - Spojené státy americké

Počet stran výsledku

10

Strana od-do

224501

Kód UT WoS článku

001117846700010

EID výsledku v databázi Scopus

2-s2.0-85179757967