TL characteristics of Ce3+-doped NaLi2PO4 TLD phosphor (original) (raw)

Journal of Radioanalytical and Nuclear Chemistry, 2014

Abstract

ABSTRACT Ce3+-doped NaLi2PO4 orthophosphate (with different impurity concentrations, i.e., 0.01-0.3 mol%) was prepared by a solid state reaction method. Formation of the material was confirmed using powder X-ray diffraction analysis. TL intensity was found to be the highest for the material having impurity concentration 0.2 mol% after annealing it at around 600 K for 1 h and subsequently quenching to room temperature. A typical glow curve consists of three peaks at around 454, 493 and 570 K (dosimetry peak). Good sensitivity (similar to 8 times more than that of TLD-100), low fading (similar to 15 % in 2 months), low-Z material (Z (eff) a parts per thousand 10.8), very wide dose response (i.e., 0.1 Gy-1.0 kGy of gamma rays) make the material a 'good' thermoluminescent dosimeter (TLD) phosphor suitable for personnel, medical and environmental dosimetry of high-energy radiation using TL. It could also be used during cancer therapy and sterilization of food where high doses are needed to be monitored.

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