GAGG(Ce) Scintillation Crystals
GAGG(Ce) - Gadolinium Aluminium Gallium Garnet (Gd₃Al₂Ga₃O₁₂), doped with Ce is a newly developed scintillator. It is one of the brightest available scintillators with an emission peak at 520nm. GAGG(Ce) has good stopping power, is physically rugged and and well suited to a broad range of applications.

GAGG(Ce) scintillator crystals are:
  • Available in the following variants:
Grade Light Yield (photons/MeV) Decay Time (ns)
High Light Yield 60,000 < 150
Balanced 50,000 < 90
Fast Decay 40,000 < 50

  • Good absorbers with good stopping powers - density 6.63 g/cm³
  • Robust with good mechanically characteristics

GAGG(Ce) scintillator crystals have the following issues which should be noted:
  • Light emission has a good part above 500nm, a region where photomultipliers are less sensitive

GAGG(Ce) scintillator crystals are useful in diverse applications such as:
  • Medical Imaging - PET, PEM, SPECT and CT
  • Specialist applications in high energy, nuclear, space and medical physics
GAGG(Ce) Scintillation Crystals
- Properties -
GAGG(Ce) Scintillator Emission Spectrum
GAGG(Ce) Scintillator Emission Spectrum
GAGG(Ce) Mass Attenuation Coefficients
GAGG(Ce) Mass Attenuation Coefficients
GAGG(Ce) Scintillation Crystals
- Optical Properties -
Property Units Value
Wavelength (Max. Emission) nm 520
Wavelength Range nm 475 - 800
Decay Times ns 50 - 150
Light Yield photons/keV 40 - 60
Photoelectron Yield % of NaI(Tl) TBA
Radiation Length cm TBA
Optical Transmission µm TBA
Transmittance % TBA
Refractive Index 1.9 @540nm
Reflection Loss/Surface % TBA
Neutron Capture Cross-section barns TBA
GAGG(Ce) Scintillation Crystals
- Mechanical Properties -
Property Units Value
Chemical Formula Gd₃Al₂Ga₃O₁₂
Density g/cm³ 6.63
Atomic Number (Effective) 54.4
Melting Point ºC 1850
Thermal Expansion Coeff. C⁻¹ TBA x 10‾⁶
Cleavage Plane None
Hardness Mho 8
Hygroscopic No
Solubility g/100gH₂0 N/A
GAGG(Ce) Scintillation Crystals
- Further Reading/Publications -
GAGG(Ce) Scintillation Crystals
- Sizes -
Diameters:
60 mm max.
Lengths:
150 mm max.
Thin Sections:
0.1 mm min. freestanding
0.01 mm min. on substrate