We have investigated the optical properties and the ionising radiation induced luminescence of xSnO.(60-x)ZnO.40P2O5 (xSZP, x=0, 2.5 and 5) glasses prepared by a conventional melt-quenching method. In optical transmittance measurements, they exhibit 80-90% transparency from UV to visible wavelengths. The photoluminescence quantum yield of the 2.5SZP glass is 95%, with microsecond order decay constants, while that of the Sn-free glass is 3%, with a fast decay time of a few nanoseconds. The peak emission wavelength in scintillation spectra under x-ray irradiation is similar to that in photoluminescence, and appears at around 400 nm. The scintillation decay times of Sn-doped and Sn-free samples under x-ray exposure are a few μs and a few ns, respectively. The thermally stimulated luminescence glow curve was evaluated. For the Sn-doped sample, glow peaks were observed at 210 and 300°C, while the Sn-free sample showed a peak at 150°C. By conducting an initial rise method for trap analysis, the trap depth was found to be 5-10 meV. Optically stimulated luminescence was also examined, and a luminescence peak appeared at around 500 nm with 630 nm stimulation. Based on these results, we propose an energy level diagram of radiation induced luminescence in these glasses.
|Number of pages
|Physics and Chemistry of Glasses: European Journal of Glass Science and Technology Part B
|Published - 2016 Aug