A high sensitive phosphor for dosimetric applications

In this study a novel TL phosphor CaMg₃(SO₄)₄:Dy³⁺ was prepared by acid distillation method. The TL response of this phosphor towards γ-rays and carbon ion beam was tested. Good dosimetric glow curve was observed which is stable against both the type of radiations. The CaMg₃(SO₄)₄:Dy³⁺ phosphor doped with 0.2 mol% of Dy³⁺, irradiated with γ-ray shows nearly equal sensitivity to that of commercially available CaSO₄:Dy TLD phosphor whereas 3.5 times more sensitivity than CaSO₄:Dy, when irradiated with carbon ion beam. The change in glow peak intensities and glow peak temperature with variation in irradiation species and energy of ion beam is discussed here. The effect of these on trapping parameters is also illustrated.