Citation
Y.M. Amin, . and R.H. Mahat, . (1995) UV induced thermoluminescene in Malaysian limestone and its suitability as UV dosimeter. [Proceedings Paper]
Abstract
UV light is used to induce electron trapping in limestone. The trapped electrons can be released by heating. Their subsequence recombination with hole traps produce visible light. It was found that the glow curve a plot of light intensity vs. temperature of heating has peaks the temperature of 70 C and 280 C corresponds to trapping level of 0.91 ev and 1.11 ev respectively. By annealing the limestone structure from being aragonite to that of calcite. The light output from the annealed limestone was found to be proportional to the UV light exposure time and hence the possibility of using limestones as UV light dosimeter was also investigated.
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Abstract
UV light is used to induce electron trapping in limestone. The trapped electrons can be released by heating. Their subsequence recombination with hole traps produce visible light. It was found that the glow curve a plot of light intensity vs. temperature of heating has peaks the temperature of 70 C and 280 C corresponds to trapping level of 0.91 ev and 1.11 ev respectively. By annealing the limestone structure from being aragonite to that of calcite. The light output from the annealed limestone was found to be proportional to the UV light exposure time and hence the possibility of using limestones as UV light dosimeter was also investigated.
Additional Metadata
| Item Type: | Proceedings Paper |
|---|---|
| AGROVOC Term: | LIMESTONE |
| AGROVOC Term: | ULTRAVIOLET RADIATION |
| AGROVOC Term: | RADIATION |
| AGROVOC Term: | HEATING |
| Geographical Term: | MALAYSIA |
| Depositing User: | Ms. Suzila Mohamad Kasim |
| Last Modified: | 24 Apr 2025 05:13 |
| URI: | http://webagris.upm.edu.my/id/eprint/11143 |
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