Mechanism of F-center luminescence in anion-defective aluminum oxide single crystals
- 1 July 2003
- journal article
- Published by Pleiades Publishing Ltd in Physics of the Solid State
- Vol. 45 (7), 1260-1266
- https://doi.org/10.1134/1.1594239
Abstract
New experimental data illustrating the effect of deep traps on the luminescence properties of anion-defective α-Al2O3 single crystals are presented. It was established that deep traps have electronic nature and their filling occurs through photoionization of F centers and is accompanied by F → F+-center conversion. Model concepts were developed that describe the luminescence mechanism in anion-defective aluminum oxide single crystals with inclusion of thermal ionization of the excited F-center states. The validity of the model was supported by experimental data obtained in a study of thermoluminescence, thermally stimulated exoelectron emission, and thermally stimulated electrical conductivity.Keywords
This publication has 9 references indexed in Scilit:
- Localised and delocalised optically induced conversion of composite glow peak 5 in LiF:Mg,Ti (TLD-100) to glow peak 4 as a function of postirradiation annealing temperature.Radiation Protection Dosimetry, 2002
- Influence of Thermal Quenching on the Thermostimulated Processes in a-Al2O3. Role of F and F+ CentresRadiation Protection Dosimetry, 2002
- Influence of the irradiation temperature on TL sensitivity of Al2O3:CRadiation Measurements, 2001
- Characterisation of Al2O3 for Use in Thermally and Optically Stimulated Luminescence DosimetryRadiation Protection Dosimetry, 1999
- Thermal Quenching of F-centre Luminescence in Al2O3:CRadiation Protection Dosimetry, 1999
- A review of the optical properties of anion lattice vacancies, and electrical conduction in α-Al2O3: their relation to radiation-induced electrical degradationJournal of Nuclear Materials, 1995
- Supralinearity and sensitization of thermoluminescence. I. A theoretical treatment based on an interactive trap systemJournal of Physics D: Applied Physics, 1994
- Photoionisation of the F centre in calcium oxideJournal of Physics C: Solid State Physics, 1980
- Lifetime of the ExcitedCenterPhysical Review B, 1963