GSAG:Ce scintillator: material optimization and intrinsic bottlenecks

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68378271%3A_____%2F25%3A00636120" target="_blank" >RIV/68378271:_____/25:00636120 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/60461373:22310/25:43933683

Výsledek na webu

<a href="https://hdl.handle.net/11104/0367123" target="_blank" >https://hdl.handle.net/11104/0367123</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1039/d5ma00095e" target="_blank" >10.1039/d5ma00095e</a>

Jazyk výsledku

angličtina

Název v původním jazyce

GSAG:Ce scintillator: material optimization and intrinsic bottlenecks

Popis výsledku v původním jazyce

Several Sc-admixed garnet single crystals of the general composition (Gd,Sc)3(Sc,Al)5O12:Ce and the well-established Gd3Ga2.7Al2.3O12:Ce (GGAG:Ce) one were grown using the micropulling down method. Their optical, luminescence and scintillation characteristics were measured and mutually compared to further optimize the former compositions and reveal the reason for their lower scintillation performance with respect to GGAG:Ce. Correlated experiments of time-resolved luminescence and scintillation spectroscopies further completed by thermoluminescence glow curve measurement and electron paramagnetic resonance (performed on Gd-free Sc-admixed garnets) indicate that Sc3+ is situated at the dodecahedral site of the garnet lattice as a dominant electron trap, creating a bottleneck in the scintillation mechanism of Sc-admixed garnets. This is mainly responsible for the degradation of scintillation efficiency in comparison with GGAG:Ce despite nearly the same effects of Sc and Ga in lowering the conduction band edge in these multicomponent garnets. Calculations of the electronic band structure confirm that the 3d energy levels of Sc3+ at the dodecahedral site are situated in the forbidden gap in Sc-admixed garnets.

Název v anglickém jazyce

GSAG:Ce scintillator: material optimization and intrinsic bottlenecks

Popis výsledku anglicky

Several Sc-admixed garnet single crystals of the general composition (Gd,Sc)3(Sc,Al)5O12:Ce and the well-established Gd3Ga2.7Al2.3O12:Ce (GGAG:Ce) one were grown using the micropulling down method. Their optical, luminescence and scintillation characteristics were measured and mutually compared to further optimize the former compositions and reveal the reason for their lower scintillation performance with respect to GGAG:Ce. Correlated experiments of time-resolved luminescence and scintillation spectroscopies further completed by thermoluminescence glow curve measurement and electron paramagnetic resonance (performed on Gd-free Sc-admixed garnets) indicate that Sc3+ is situated at the dodecahedral site of the garnet lattice as a dominant electron trap, creating a bottleneck in the scintillation mechanism of Sc-admixed garnets. This is mainly responsible for the degradation of scintillation efficiency in comparison with GGAG:Ce despite nearly the same effects of Sc and Ga in lowering the conduction band edge in these multicomponent garnets. Calculations of the electronic band structure confirm that the 3d energy levels of Sc3+ at the dodecahedral site are situated in the forbidden gap in Sc-admixed garnets.

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

Výsledek vznikl pri realizaci vícero projektů. Více informací v záložce Projekty.

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2025

Kód důvěrnosti údajů

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

Název periodika

Materials Advances

ISSN

2633-5409

e-ISSN

2633-5409

Svazek periodika

6

Číslo periodika v rámci svazku

11

Stát vydavatele periodika

GB - Spojené království Velké Británie a Severního Irska

Počet stran výsledku

9

Strana od-do

3596-3604

Kód UT WoS článku

001497318000001

EID výsledku v databázi Scopus

2-s2.0-105007024969