Transparent oxyhalide glass and glass ceramics for gamma-ray detection

Optimization of a gadolinium‐rich oxyhalide glass scintillator for gamma ray spectroscopy

“…They emitted intensive UV to blue light under a 365 nm UV lamp. 11 An absorption spectrum was also included in Figure 1 which is consistent with the PLE results. The photoluminescence and excitation spectra of a glass sample with 1.3% Ce doping are also displayed in Figure 1.…”

“…We have found that increase in F content relative to O is able to shift the band gap to higher energies. 11 We have also observed that Ce 3+ emission in a more bromine-rich environment shifts the emission to longer wavelengths, 11 which may reduce selfabsorption in the glass for improved energy resolution. And the designed glass may offer both neutron and gamma detection capability.…”

“…8 Sequential hole and electron trapping and their recombination on the Ce 3+ ion are the dominant energy-transfer process responsible for the scintillation of these materials. 11 The design of the glass composition is critical for a high performance scintillator. There is little report on the energy resolution of Ce 3+ -doped glass scintillators due to low light output or low density.…”

“…In our previous efforts we reported glass scintillators with energy resolutions of 27% in 2011 10 and 20% in 2013. 11 The design of the glass composition is critical for a high performance scintillator. First, for gamma detection it is important to maximize the density of the scintillator to provide greater gamma radiation stopping power which in turn improves the energy resolution through greater energy absorption.…”

Rare-earth Activated Glass and Glass-Ceramic for Neutron Detection

“…In our group we have fabricated similar gadolinium halide based materials and demonstrated gamma ray detection capability with distinctive photopeaks in the range of 59.5-2,505 keV and a detection efficiency equivalent to NaI:Tl. 4,5 In this study 6 LiF was introduced into the glass matrix for thermal neutron capture. 6 Li, which has about 7.5% abundance in natural Li, exhibits a large absorption cross section for thermal neutrons.…”