Thermoluminescence induced by gamma radiation In LiCsSO4 Ferroelastic crystal doped With different heavy metals

Abstract

Thermoluminescence (TL) glow curves of lithium cesium sulphate ferroelastic crystals LiCsSO4 doped with 0.5% of Os, Tb, Eu and Tl have been studied in the temperature range from room temperature to 300"C. Three peaks are observed at about 75, 125 and 225"C. The study include also analysis of peak position and peak height of the glow curves with various dopant ions at different gamma radiation doses. The results are interpreted on the basis of point defects introduced interstitially or substitutionally admixtured into the host lattice. In spite of the host material being the swtne (LiCsSO4), the glow curve structure changes due to variation of dopant materials (Os, Tb, Eu, and Tl). The obtained results are discussed in detail. "1 ;e applicability of such materials for accident dosimetry depends on the lower limit of detection.