Effect of heating rate on TL glow curves – Theoretical and experimental studies

Abstract

In the absence of thermal quenching but at the same radiation dose, the area under the glow curve at different heating rates is conserved only in TL - time plots and is not conserved in TL-temperature plots. Further at a given heating rate, the glow peak height is same in time as well as in temperature plots and the glow peak height increases with the increase of the heating rate. However to conserve area in TL - temperature plots, the TL intensity when divided by the respective heating rate lead to the decrease of glow peak height in TL/<i><img src='/image/spc_char/beta.gif'></i>-temperature plots, which is the artifact of the normalization process.<b> </b>The effect of heating rate on TL glow curves has been investigated theoretically as well as experimentally. The ambiguity prevalent in literature regarding the effect of heating rate on TL glow peak height and area under the glow curves when glow curves are plotted in time or temperature scales has been attempted to resolve. It is suggested that researchers should always present un-normalized as well as normalized TL glow curves if the glow curves (for TL sample exposed to same radiation dose) are recorded at different heating rates.