Photoluminescence and scintillation of LGS (La3Ga5SiO14), LNGA (La3Nb0.5Ga5.3Al0.2O14) and LTGA (La3Ta0.5Ga5.3Al0.2O14) single crystals

► The 241Am 5.5 MeV α-ray excited emission spectra of langasite family crystals were measured. ► The emission intensities were weak and photoluminescence decays were very fast. ► These result points to their heavy thermal quenching at room temperature.