Abstract
Currently the types of garnet transparent ceramics have been under intense investigation for X-ray and gamma-ray detection. They were produced by the technique of sintering monocrystalline grains into a large inorganic ceramic. Transparent ceramics of Ce3+-doped Y3Al5O12 (YAG) and (Gd, Y)3Al5O12 (GdYAG) especially demonstrated the ability of highly light yield and fast response when exposed to ionizing radiation. In this study, we discussed Yb3+-doped YAG transparent ceramics with different concentration as a scintillation material. Charge transfer luminescence of the Yb3+ ion is attractive due to its ultrafast decay time of few to tens nanoseconds, depending on the host lattice and temperature. After checking optical transparency and absorption coefficient, we evaluated alpha-ray excited radioluminescence spectra, and determined the decay time using the streak camera system equipped with pulsed X-ray source. The relative light yield was measured by 241Am alpha-ray exposed pulse height spectra.
