Abstract
A versatile thermoluminescence (TL) unit, adapted for glovebox operation has been designed and built to study the radioactive recombination and self activation process in inorganic materials with radioactive elements as activators. The TL unit has provision for recording the TL output in two temperature ranges, 100-320K and 300-750K. The unit incorporates an electronic temperature programmer which can control the rise in temperature of a Kanthal strip at different constant rates in the ranges mentioned above. The salient features of the instrument include five linear heating rates viz: 0.1, 0.25, 0.5, 1.0 and 2.5K/s and a facility to maintain the temperature of the sample for a long time within +or-1K at any desired value in the two ranges to enable isothermal decay studies. Furthermore, the unit has the advantages of attaining the lower temperatures (100-320K range) without the cryogenic liquid (liquid N2) or cooled gas coming directly into contact with the sample, thereby avoiding radioactive contamination of the evaporating liquid. Glow curves for the standard phosphors, CaF2, TLD-100 and Dy:CaSO4, obtained in both temperature ranges are found to be in good agreement with those reported in the literature.
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