GAGG(Ce) - Scintillator Crystal

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 - 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