- Title
- The effect of annealing and beta irradiation on thermoluminescence spectra of α-Al2O3: C, Mg
- Creator
- Kalita, Jitumani M, Chithambo, Makaiko L
- Date
- 2018
- Type
- text
- Type
- article
- Identifier
- http://hdl.handle.net/10962/112875
- Identifier
- vital:33669
- Identifier
- https://doi.org/10.1016/j.jlumin.2017.12.036
- Description
- The effect of annealing on thermoluminescence spectra of beta irradiated α-Al2O3:C,Mg has been studied. Measurements were made on an un-annealed sample and samples annealed at 600, 700 and 900 °C. A glow curve measured at 1 °C/s from samples irradiated to 1 Gy shows a high intensity peak at 163 °C and six secondary peaks of weaker intensity at 43, 73, 195, 280, 329 and 370 °C. When the samples are annealed at 700 or 900 °C, an additional secondary peak appears at 100 °C. The thermoluminescence spectrum of an un-annealed sample measured at 1 °C/s between 300 and 700 nm shows the main emission band at ~ 410 nm and subsidiary emission bands at ~ 325 and 485 nm. The emission from samples annealed at 700 and 900 °C show similar bands except for a decrease in intensity of the emission at 485 nm. The emission bands at 325, 410 and 485 nm are attributed to F+, F and F22+(2Mg) -centres respectively. The decrease of the emission band at 485 nm is deduced to be due to the destruction of the F22+(2Mg) centre at 700 °C. The emission bands are unaffected by irradiation dose between 10 and 320 Gy. However, when the sample is annealed at or beyond 700 °C, any effects on the F+ and F centres emission can be easier distinguished particularly for doses greater than 10 Gy.
- Format
- 6 pages, pdf
- Language
- English
- Relation
- Journal of Luminescence, Kalita, J.M. and Chithambo, M.L., 2018. The effect of annealing and beta irradiation on thermoluminescence spectra of α-Al2O3: C, Mg. Journal of Luminescence, 196, pp.195-200., Journal of Luminescence volume 196 195 200 April 2018 0022-2313
- 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
Chithambo, Makaiko Liwiro (Prof)
SDG 09. Industry, Innovation and Infrastructure
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