Study of Re<sup>3+</sup> (Re<sup>3+</sup>= Er<sup>3+</sup>, Tm<sup>3+</sup>) impurity effects on thermoluminescence characteristic of magnesium sulfate nanorods.
Almasifard F, Zahedifar M.
Abstract
In this research, rare earth erbium and thulium (Er 3+ and Tm3+) doped MgSO₄ nanorods (NRs) were synthesized by semi-Co-precipitation method. For assurance of MgSO₄ formation and entrance of impurity into the lattice XRD, SEM and EDS analysis were done. The optimum amount of impurity (the amount of impurity in which the TL response is the most) was determined in 0.1 mol% for Er and 0.5 mol% for Tm. Thermoluminescence (TL) dose response and reusability of MgSO₄: M (M = Er, Tm) was studied. Linear range for dose response was measured up to 10⁴ Gy for MgSO₄: Er and 50 Gy for MgSO₄: Tm. To calculate TL kinetic parameters, computerized glow curve deconvolution (CGCD) and initial rise (IR) methods were applied. TL intensities of synthesized magnesium sulfates were compared with a standard sample, LiF: Mg, Ti (TLD-100), the obtained result was hopeful.