[Inaccuracy in the acquisition of glowcurves with the TL-Reader Harshaw 5500]

Putting into operation a TL Reader Type Harshaw 5500 revealed some inaccuracies in the acquisition of glowcurves, i.e., a shift of the glowcurves upon exposure to different temperatures in sequential measurements. These inaccuracies hinder a precise analysis of parts of the glowcurves with easy methods. The present investigation focused on the analysis of possible causes for these observations. It was found out that one requirement for a reproducible data acquisition is the stability and precise positioning of the thermoluminescence dosimeter in the heating position. These conditions allow constant heating and therefore a stable glowcurve concerning the temperature. The accuracy of glowcurve acquisition could be clearly improved with mechanical changes of the TL Reader. Long-term observations are still required.