Rare-earth Garnets (YAG:Ce, LuAG:Ce, GAGG:Ce)
Yttrium aluminium garnet Y3Al5O12:Ce (YAG:Ce) and Lutetium Aluminum Garnet activated by cerium (Lu3Al5O12:Ce, LuAG:Ce) are fast and bright scintillation materials. The decay time is 70-100 ns. This is of advantage in time dependent and coincidence measurements. The wavelength of scintillation emission is about 530-550 nm, which is ideal for photodiode and avalanche diode readout.
LuAG is a good alternative to dense and fast rare-earth orthosilicate scintillators (LSO:Ce, GSO:Ce, LYSO:Ce). The material is mechanically and chemically stable with no cleavage and hygroscopicity. The material can be machined into a variety of shapes and sizes including prisms, spheres and thin plates. Recently developed Gd3Al5-xGaxO12:Ce (GAGG:Ce) with the light yield up to 50000 phot/MeV are the brightest known oxide scintillators.
These materials can be used for high energy gamma and charged particle detection, positron emission tomography matrices, high spatial resolution imaging screens for x-rays, gamma and beta.
- very high light yield (GAGG:Ce)
- high density (LuAG:Ce, GAGG:Ce)
- good matching for photodiode and avalanche diode readout
- very good machining properties
- fast decay time