Thermoluminescence characteristics and dosimetric aspects of fluoroperovskites (NaMgF3:Eu2+,Ce3+)
来源期刊：Journal of Rare Earths2014年第6期
论文作者：D.Joseph Daniel O.Annalakshmi U.Madhusoodanan P.Ramasamy
文章页码：496 - 500
摘 要：The perovskite-like NaMgF3 polycrystalline powder samples, pure and rare earth doped, were synthesized by conventional solid state reaction method. The perovskite material was doped with 0.2 mol.% of EuF3 and CeF3 impurity. Phase purity of synthesized compounds was analyzed by powder X-ray diffraction technique. The thermoluminescence response of polycrystalline samples showed a linear response up to 12 Gy and then became sub linear at higher doses. The order of kinetics（b）, activation energy（E） and other trapping parameters were calculated using peak shape method and variable heating rate method. From glow curve analysis the symmetric factor was calculated. The glow curve showed two peaks at 404 and 488 K, and both of them confirmed the thermoluminescence in the phosphor, which obeyed second-order kinetics. The experimental resulted showed that this phosphor could have potential applications in radiation dosimetry.
D.Joseph Daniel1，O.Annalakshmi2，U.Madhusoodanan2，P.Ramasamy1
1. Centre for Crystal Growth, SSN College of Engineering2. Radiological Safety Division,Indira Gandhi Centre for Atomic Research
摘 要：The perovskite-like NaMgF3 polycrystalline powder samples, pure and rare earth doped, were synthesized by conventional solid state reaction method. The perovskite material was doped with 0.2 mol.% of EuF3 and CeF3 impurity. Phase purity of synthesized compounds was analyzed by powder X-ray diffraction technique. The thermoluminescence response of polycrystalline samples showed a linear response up to 12 Gy and then became sub linear at higher doses. The order of kinetics（b）, activation energy（E） and other trapping parameters were calculated using peak shape method and variable heating rate method. From glow curve analysis the symmetric factor was calculated. The glow curve showed two peaks at 404 and 488 K, and both of them confirmed the thermoluminescence in the phosphor, which obeyed second-order kinetics. The experimental resulted showed that this phosphor could have potential applications in radiation dosimetry.
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