Compensation effect in thermoluminescence of TLD-500

Thermoluminescence in the main dosimetric peak at 450 K in the 2.4-, 3.0- and 3.8-eV emission bands of the TLD-500 detectors has been studied. The thermoluminescent (TL) curves, which are obtained at the doses ΔD=10-5–1Gy, are approximated by the general-order kinetics equation. A compensation relation between the activation energy and the effective frequency factor is observed for all the bands. The compensation relation parameters—the isokinetic temperature TiTi and the constant s0s0—are estimated. Possible applications of the said quantities in practical luminescent dosimetry are noted. It is concluded that the compensation effect influences the kinetics of TL processes in the TLD-500 dosimetric crystals.