Abstract
K2Ca2(SO4)3:Eu nanophosphor was synthesized by chemical coprecipitation method and annealed at different temperatures and quenched. Characterization was done by XRD, TEM, FTIR and TG-DTA. Changes in morphology, phase, lattice parameters and thermoluminescence glow curve structures were observed on annealing. TL glow curves deconvoluted by CGCD method for determining trapping parameters. Thermoluminescence dose response has been studied in the range from 0.1 Gy to 100 kGy. Photoluminescence studies showed a wide blue-shift in the emission bands while going from micro- to nanosize and also conversion from Eu3+ to Eu2+ was observed on annealing and irradiation. Dosimetric characteristics of the nanocrystalline material annealed at 700 °C were further explored as it was found most sensitive amongst other annealed at different temperatures. Simple glow curve structure, good sensitivity, low fading, very wide-range of measurable doses, reusability makes this phosphor a good candidate for its application in radiation dosimetry, especially, for measurement of high-doses.
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