Radiation-induced luminescence properties of SrBr2 transparent ceramics doped with different eu concentrations

Abstract

We successfully developed Eu-doped SrBr2 transparent ceramics with different Eu concentrations by spark plasma sintering and evaluated their optical and scintillation properties. As optical properties, the diffuse transmittance of the 0.01% Eu-doped sample was ~60% in the visible range. All the samples showed two absorption bands at around 250 and 350 nm, the origin of which was the 4f–5d (eg, t2g) transitions of Eu2+. Regarding scintillation spectra, the spectral shapes of all the Eu-doped SrBr2 transparent ceramics were similar to that of single crystals. In pulse height spectra, the photoabsorption peak of the 0.01 and 0.1% Eu-doped samples was confirmed, and the estimated light yields were 6600 and 13300 photons/MeV, respectively. Regarding afterglow properties, the afterglow levels of the 0.01 and 0.1% Eu-doped samples were comparable to that of a conventional Tl-doped CsI scintillator.