Single crystal Ce doped scintillator material with garnet structure sensitive to gamma ray and neutron radiation

Role of the Dilution of the Gd Sublattice in Forming the Scintillation Properties of Quaternary (Gd,Lu)3Al2Ga3O12: Ce Ceramics

“…The incorporation of Gd in the composition of multi-cationic garnets for brighter scintillation is preferable due to the capability of the Gd sublattice in the crystal to be a reservoir for Frenkel-type excitons, providing further electronic excitation transfer to luminescence centers, as evidenced by photoluminescence and scintillation measurements [6]. The effect of the Ga/Al ratio on the luminescence decay rate and other scintillation properties has been studied in single crystals of Gd 1 Y 2 Al 5−x Ga x O 12 :Ce, Gd 2 Y 1 Al 5−x Ga x O 12 :Ce, and Mg-co-doped Gd 3−y Y y Al 5−x Ga x O 12 :Ce (GYAGG) grown by the micro-pulling down technique and in a ceramics form [7][8][9][10][11][12][13]. Disorder in the distribution of Al and Ga ions in oxygen-coordinated tetrahedra and octahedra ensures a possibility for engineering the bandgap and the crystal field strength acting on the activator ion and creating a diversity of sites for Ce activator localization in the matrix host [14].…”