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RESEARCH PRODUCT

Radiation Defects in LiBaF3 Perovskites

Maris SpringisH.-j. FittingUldis RogulisA. VeispalsI. TaleP. KulisJ. Trokss

subject

Materials sciencelawTransition dipole momentAnalytical chemistryElectronAbsorption (electromagnetic radiation)Electron paramagnetic resonanceLuminescenceRecombinationQuantum tunnellingAfterglowlaw.invention

description

We investigated the electron paramagnetic resonance (EPR), recombination afterglow, thermostimulated luminescence (TSL) and absorption of LiBaF3 perovskites crystals X-irradiated at 80 K The self-trapped hole centre VK(F2-) oriented along the [110] axis and electron F type (FA) centres are identified. X-irradiation at temperatures below 200 K results in creation of a long-term temperature-independent afterglow-tunnelling luminescence (TL), with main emission bands at 300, 370 nm and 430 nm. The short wavelength TL bands are associated with the tunnelling recombination of the F type centre with the VK centre. The thermal stability of VK centre is estimated to be about 130 K.

yearjournalcountryeditionlanguage
2000-01-01
https://doi.org/10.1007/978-94-011-4030-0_39