- Title
- Thermoluminescence of the persistent-luminescence phosphor, BaAl2O4: a stuffed tridymite
- Creator
- Pandey, A
- Creator
- Chithambo, Makaiko L
- Date Issued
- 2018
- Date
- 2018
- Type
- text
- Type
- article
- Identifier
- http://hdl.handle.net/10962/113048
- Identifier
- vital:33693
- Identifier
- hhttps://doi.org/10.1016/j.radmeas.2018.01.004
- Description
- BaAl2O4 is a stuffed tridymite used as a long-lasting phosphor. The thermoluminescence of BaAl2O4 prepared by solution-combustion is reported. Analysis of the sample using X-ray diffraction shows that it formed as a single phase compound with a hexagonal structure following annealing at 1200 °C. A broad photoluminescence emission band between 300 and 650 nm was detected due to excitation at 248 nm. The phosphor showed a natural TL peak at 102 °C for measurement at 1 oCs−1 and, when beta irradiated to 100 Gy, two broad peaks at 123 and 318 °C also for heating at 1 oCs−1. The analysis of the main glow peak at 123 °C suggests that it is a combination of several collocated peaks, that is, peaks embedded within each other. We resolved four such components labelled peaks 1 to 4. The thermoluminescence decreases with heating rate in a way consistent with thermal quenching whose activation energy was determined as ∼0.65eV using peak 3. Interestingly, this value of the activation energy for thermal quenching for BaAl2O4, a stuffed derivative of silica, is similar to literature values for quartz (a silica), suggesting that the recombination centre in the two cases may be similar.
- Format
- 5 pages
- Format
- Language
- English
- Relation
- Radiation Measurements
- Relation
- Pandey, A. and Chithambo, M.L., 2018. Thermoluminescence of the persistent-luminescence phosphor, BaAl2O4; A stuffed tridymite. Radiation Measurements, 120, pp.73-77.
- Relation
- Radiation Measurements volume 120 73 77 December 2018 1350-4487
- Rights
- Elsevier
- Rights
- Use of this resource is governed by the terms and conditions of the Science Direct Terms and Conditions Statement (https://www.elsevier.com/legal/elsevier-website-terms-and-conditions)
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RU Department of Physics and Electronics
SDG 09. Industry, Innovation and Infrastructure
Chithambo, Makaiko Liwiro (Prof)
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