Influence of Cu and Mn impurities on thermally stimulated luminescence studies of MgSO4 compound

Thermally stimulated luminescence (TSL) of undoped and doped MgSO4 with activators such as Cu and Mn has been investigated which are prepared by recrystallization method. The formations of undoped and doped MgSO4 compounds are confirmed by XRD and FTIR studies. Photoluminescence studies have been undertaken to ensure the successful incorporation of Cu and Mn impurities in the MgSO4 host lattice. Comparison of TL intensity of the most intensive glow peak of Cu and Mn doped MgSO4 compounds with that of undoped MgSO4 shows that addition of Cu and Mn impurity in MgSO4 compound enhances the TL intensity by about 2.5 and 6 times respectively. The trap parameters namely order of kinetics (b), activation energy (E), frequency factor (s) and Balarin parameter (γ) associated with the most intensive glow peak of MgSO4:Cu and MgSO4:Mn phosphors were determined by using isothermal decay method and glow curve shape (Chen’s) method and these parameters are in good agreement.

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