Abstract
Abstract In previous work it was found that there were peaks around 70, 100 and 235 oC in the thermoluminescence (TL) glow curve of zirconia read out immediately after ultraviolet (UV) irradiation, but the 70 oC peak faded within approximately 30 min. Thus only 100 and 235 oC TL peaks usually appeared in the TL glow curve if the readout was not taken immediately after the UV irradiation. The discovery of the 70 oC peak in the TL glow curve of zirconia read-out the second time right after the first TL readout is reported. The ZrO2 still emitted TL to some extent in the second readout if no annealing was done after the first readout, but the 70 oC peak in the TL glow curve became the main peak. The recovery of the 70 oC peak can be explained as heat transferred TL of zirconia stimulated by heat energy from the heating planchet of the TL detector during the first readout. Detailed experimental work and discussion are presented.
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