Glow curve analysis of β-particles irradiated Na21Mg(SO4)10Cl3:Dy phosphor

Dy doped Na21Mg(SO4)10Cl3 phosphor was prepared by modifying the solid state method and the formation of the compound was confirmed by X-ray diffraction (XRD) study. Morphology of the phosphor was analyzed by scanning electron microscopy (SEM). The thermally stimulated luminescence (TSL) studies of Dy doped Na21Mg(SO4)10Cl3 samples show the complex glow curve. Powder samples of Na21Mg(SO4)10Cl3:Dy were irradiated by 2.2 MeV β-particles within dose range of 100–16,000 mGy. Analysis of the thermoluminescence glow curves was carried out by Tm–Tstop and glow curve deconvolution (GCD) method. Trapping parameters (activation energy and frequency factor) for individual deconvoluted peaks were obtained by Chen's peak shape method. The comparison of trapping parameters between γ-ray irradiated and β-particles irradiated Na21Mg(SO4)10Cl3:Dy phosphor were also studied. -- Highlights: • This study reports the thermoluminescence properties of Na21Mg(SO4)10Cl3:Dy phosphor for β-particles irradiation. • The main focus of this study is on the response of the phosphor to β-particles and difference in behavior from γ-ray irradiation. • Good linearity was observed for measuring the doses of β-particles upto 1500 mGy