LM-OSL thermal activation curves of quartz: Relevance to the thermal activation of the 110 degrees C TL glow-peak
Kıyak, Nafiye Güneç
Polymeris, George S.
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The thermally activated characteristics (TAC) of the linearly modulated optically stimulated luminescence (LM-OSL) signals of seven quartz samples from different origin were studied relative to the TAC of their respective thermoluminescence (TL) glow-peaks at 110 degrees C. Within the framework of the study the TAC behavior of the LM-OSL was investigated by measuring the OSL signal at room temperature (RT) with the 110 degrees C glow-peak present during OSL measurements, as well as, at 125 degrees C without the glow-peak at 110 degrees C removed by a cut-heat at 180 degrees C prior to OSL measurement. The LM-OSL curves were analyzed into individual components using a computerized deconvolution procedure. It was found that all individual LM-OSL components of each kind of quartz follow the TAC behavior of the respective TL glow-peak at 110 degrees C. The fourth component of the LM-OSL curve, centered at about t(m) = 400 s, appeared when the OSL measurements were performed at RT, whereas it was absent when the OSL measurement were performed at 180 degrees C. It is suggested that this component is closely related with the TL glow-peak at 110 degrees C.