6533b834fe1ef96bd129d4c0
RESEARCH PRODUCT
Thermal relaxation of colour centres in LiBaF3crystals
Maris SpringisHe J. FittingA. VeispalsUldis RogulisP. KulisI. Talesubject
Nuclear and High Energy PhysicsRadiationAbsorption spectroscopyChemistryMineralogyActivation energyElectronRadiationCondensed Matter PhysicsRandom walkMolecular physicsIonGeneral Materials ScienceThermal stabilityAbsorption (electromagnetic radiation)description
Abstract Processes in LiBaF3 crystals caused by the thermal decay of F-type centres created by X-irradiation at room temperature have been examined. It is shown that the thermal decay of F-type centres results in the formation of two kinds of electron centres peaking at 630 nm and 740 nm differing in thermal stability. Weak TSL intensity, accompanying the decay of F-centres, also observed as well as the low value of the process activation energy suggest that due to the presence of moving anion vacancies a random walk of the F-centres occur. We propose that in course of the random walk of the F-centres both the aggregate F-centres are created and the annihilation with some complementary radiation defects take place.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2001-11-01 | Radiation Effects and Defects in Solids |