Tb³⁺-activated phosphate luminescent glass for x-ray conversion screens

Phosphate glasses 60P<inf>2</inf>O<inf>5</inf>-15CS<inf>2</inf>O- 15Al<inf>2</inf>O<inf>3</inf>-10BaO were made by high temperature melt-annealing method. The absorption spectra, excitation spectra and emission spectra of Gd³⁺-Tb³⁺ and Ce<inf>3+</inf>-Gd³⁺-Tb³⁺ co-doped phosphate glass 60P<inf>2</inf>O<inf>5</inf>-15CS<inf>2</inf>O- 15Al<inf>2</inf>O<inf>3</inf>-10BaO were studied. The experimental results indicate that, the doping of Ce<inf>3+</inf> and Gd³⁺ in Tb³⁺ phosphate glass has a good effect on the 545 nm emission of Tb³⁺ at UV excitation. The Ce<inf>3+</inf>-Gd³⁺-Tb³⁺ co-doped phosphate glass have a good x-ray luminescence at the radiation of x-ray with energy in 50-120 kev, and a high space resolution. The Ce<inf>3+</inf>-Gd³⁺-Tb³⁺ co-doped phosphate luminescence glass is a promising material for using in the digital radiography system in medical devices