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Investigation on relation between TL and OSL of Li2B4O7:Cu, In |
| Xiong Zhengye, Tang Qiang, Zhang Chunxiang |
| School of Physics Science and Engineering, Sun Yat-sen University, Guangzhou 510275, China; |
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Abstract Polycrystal Li2B4O7 (LBO) doped with Cu and In was prepared and then sintered at different temperatures. X-ray diffraction (XRD) was applied to get the parameters of the LBO structure, thermoluminescence (TL) and optically stimulated luminescence (OSL) were measured, and a second-order exponential decay model was fitted to the OSL decay curves. The results indicate that the original number of OSL traps that have captured electrons is linearly related with the sum of TL decay during the OSL process. Mean decay constant of OSL is related to the sintered temperature. The possible reason is that the sintered temperature affects the crystal sizes of the polycrystal, and consequently affects the stimulating light s intensity and the photoionization cross-section of the electrons, which have been captured by the traps.
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Issue Date: 05 June 2008
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