Energy trapping processes in novel complex oxide scintillators
Project goals
The project is aiming at investigation of charge trapping and energy conversion phenomena in the novel high-density, lutetium-rich scintillating crystals of aluminum perovskites, garnets and orthosilicates. Correlated ESR, TSL and radiation induced absorption experiments will be employed in the study. Combination of these experimental techniques for variety of dopants (luminescent centers) in the high quality crystal hosts will provide deep understanding of the nature of trapping centres as well as their role in the energy transfer and storage processes at an atomic level. We will find out general mechanism of radiation-induced defects (colour centers) formation in the studied materials and also identify particularly harmful defects responsible for thedegradation of scintillator parameters. Relation among the material scintillation performance, occurrence and nature of trapping states and particular production technology will be systematically investigated.
Keywords
scintillatorsaluminum perovskitesgarnetsorthosilicatespoint defectsthermally stimulated luminescence, Electron Paramagnetic Resonance
Public support
Provider
Academy of Sciences of the Czech Republic
Programme
Grants of distinctly investigative character focused on the sphere of research pursued at present particularly in the Academy of Sciences of the Czech Republic
Call for proposals
Výzkumné granty 8 (SAV02008-A)
Main participants
—
Contest type
VS - Public tender
Contract ID
IAA100100810
Alternative language
Project name in Czech
Procesy záchytu energie v nových scintilátorech na bázi komplexních oxidů
Annotation in Czech
Projekt je zaměřen na výzkum přenosu náboje a energie v nových scintilačních krystalech aluminium-perovskitů, granátů a orthosilikátů s vysokým obsahem lutecia a s vysokou hustotou. Ke studiu budou využívána korelovaná měření Elektronové Paramagnetické Rezonance (EPR), Tepelně Stimulované Luminiscence (TSL) a indukované optické absorpce. Kombinace měření různě dopovaných vysoce kvalitních krystalů výše zmiňovanými metodami nám umožní hlouběji porozumět podstatě záchytných center a pochopit jejich roli vpřenosu a zachycení energie na atomární úrovni. Budeme hledat obecný mechanismus tvorby zářením indukovaných poruch (luminiscenčních center) a identifikovat škodlivá centra odpovědná za degradaci scintilačních parametrů. Systematicky budou studovány vztahy mezi scintilační výkonností materiálu, výskytem a podstatou záchytných stavů a detaily technologie jeho růstu.
Scientific branches
R&D category
ZV - Basic research
CEP classification - main branch
BM - Solid-state physics and magnetism
CEP - secondary branch
JB - Sensors, detecting elements, measurement and regulation
CEP - another secondary branch
JJ - Other materials
10302 - Condensed matter physics (including formerly solid state physics, supercond.)
20201 - Electrical and electronic engineering
20502 - Paper and wood
20503 - Textiles; including synthetic dyes, colours, fibres (nanoscale materials to be 2.10; biomaterials to be 2.9)
21001 - Nano-materials (production and properties)
21002 - Nano-processes (applications on nano-scale); (biomaterials to be 2.9)
Completed project evaluation
Provider evaluation
V - Vynikající výsledky projektu (s mezinárodním významem atd.)
Project results evaluation
The nature of intrinsic and impurity-related energy trapping centres in wide-band-gap aluminum perovskites and garnets and orthosilicates has been determined at an atomistic level and the role of these defects in the energy transfer and storage processes
Solution timeline
Realization period - beginning
Jan 1, 2008
Realization period - end
Dec 31, 2011
Project status
U - Finished project
Latest support payment
Mar 18, 2011
Data delivery to CEP
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data delivery code
CEP12-AV0-IA-U/02:2
Data delivery date
Jun 28, 2013
Finance
Total approved costs
4,413 thou. CZK
Public financial support
4,413 thou. CZK
Other public sources
0 thou. CZK
Non public and foreign sources
0 thou. CZK
Recognised costs
4 413 CZK thou.
Public support
4 413 CZK thou.
0%
Provider
Academy of Sciences of the Czech Republic
CEP
BM - Solid-state physics and magnetism
Solution period
01. 01. 2008 - 31. 12. 2011