Studium samozachycených děr v krystalickém scintilátoru CdWO4 metodou elektron-spinové rezonance

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68378271%3A_____%2F08%3A00319865" target="_blank" >RIV/68378271:_____/08:00319865 - isvavai.cz</a>

Výsledek na webu

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DOI - Digital Object Identifier

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Jazyk výsledku

angličtina

Název v původním jazyce

Electron spin resonance study of self-trapped holes in CdWO4 scintillator crystals

Popis výsledku v původním jazyce

The self-trapping of holes at oxygen anions was studied by electron spin resonance in UV irradiated CdWO4 crystals. It was found that the self-trapped hole is either delocalized in the space between two energetically equivalent nearest neighbor oxygen ions or tunnels between them. When the temperature increases above 40-50 K the holes are thermally liberated and can be retrapped by oxygen ions perturbed by impurity ions. In case of the Nb5+ or Li+ stabilizing impurities the O- centers are thermally stable up to 160-170 K. Study of kinetic characteristics of the self-trapped holes suggests that holes leave oxygen ions by thermally assisted tunneling mechanism via two slightly different channels. Corresponding ionization energy is E=90 meV and pre-exponential factors are about 10^5 s-1. Thermal stability and kinetic characteristics of the trapped holes are discussed in light of the scintillation and thermoluminescence characteristics of CdWO4.

Název v anglickém jazyce

Electron spin resonance study of self-trapped holes in CdWO4 scintillator crystals

Popis výsledku anglicky

The self-trapping of holes at oxygen anions was studied by electron spin resonance in UV irradiated CdWO4 crystals. It was found that the self-trapped hole is either delocalized in the space between two energetically equivalent nearest neighbor oxygen ions or tunnels between them. When the temperature increases above 40-50 K the holes are thermally liberated and can be retrapped by oxygen ions perturbed by impurity ions. In case of the Nb5+ or Li+ stabilizing impurities the O- centers are thermally stable up to 160-170 K. Study of kinetic characteristics of the self-trapped holes suggests that holes leave oxygen ions by thermally assisted tunneling mechanism via two slightly different channels. Corresponding ionization energy is E=90 meV and pre-exponential factors are about 10^5 s-1. Thermal stability and kinetic characteristics of the trapped holes are discussed in light of the scintillation and thermoluminescence characteristics of CdWO4.

Druh

J_x - Nezařazeno - Článek v odborném periodiku (Jimp, Jsc a Jost)

CEP obor

BM - Fyzika pevných látek a magnetismus

OECD FORD obor

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Projekt

<a href="/cs/project/IAA100100810" target="_blank" >IAA100100810: Procesy záchytu energie v nových scintilátorech na bázi komplexních oxidů</a><br>

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)<br>Z - Vyzkumny zamer (s odkazem do CEZ)

Rok uplatnění

2008

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

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Svazek periodika

104

Číslo periodika v rámci svazku

10

Stát vydavatele periodika

US - Spojené státy americké

Počet stran výsledku

6

Strana od-do

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Kód UT WoS článku

000262605800051

EID výsledku v databázi Scopus

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