GAGG+

Gadolinium aluminium gallium garnet doped with cerium

Technical parameters

Physical properties
	GAGG +	LuAG:Ce	YAG:Ce	YAP:Ce	CRY 18	LuAG:Pr	LuAP:Ce	BGO	PWO	CRY 19
Density	6.63 g/cm³	6.73 g/cm³	4.57 g/cm³	5.37 g/cm³	4.5 g/cm³	6.73 g/cm³	8.34 g/cm³	7.13 g/cm³	8.28 g/cm³	7.1 g/cm³
Hardness by Mohs	8.0	8.5	8.5	8.6	5.8	8.5	-	5	4	-
Index of refraction	1.9	1.84	1.82	1.95	1.79	1.84	-	2.15	2.17	1.81
Melting point	1850°C	2020°C	1970°C	1875°C	1980°C	2043°C	1960 °C	1050 °C	1123 °C	2100°C
Thermal expansion	-	-	0.8-0.9 x 10^-5/K	0.4-1.1 x 10^-5/K	-	-	-	0.7 x 10^-5/K	-	1.8-10.3 x 10^-5/K
Crystal structure	cubic	cubic	cubic	rhombic	monoclinic	cubic	-	cubic	tetragonal symetric	monoclinic
Hygroscopic	NO	NO	NO	NO	NO	NO	NO	NO	NO	NO
Scintillation properties
Wavelength of max. emission	520 nm	535 nm	550 nm	370 nm	425 nm	310 nm	365 nm	480 nm	420 nm	420 nm
Decay constant	50-150 ns	70 ns	70 ns	25 ns	45 ns	20 ns	18 ns	300 ns	5-15 ns	41 ns
Afterglow	-	-	<0.005 % at 6 ms	<0.005 % at 6 ms	-	-	-	<0.005% at 6 ms	-	-
Radiation length for 511 keV	-	1.3 cm	3.5 cm	2.7 cm	2.74 cm	1.3 cm	-	1.1 cm	0.89 cm	2.1 cm
Photon yield at 300 K (27°C)	40-60 x 10³ Ph/MeV	25 x 10³ Ph/MeV	30 x 10³ Ph/MeV	25 x 10³ Ph/MeV	30 x 10³ Ph/MeV	15-18 x 10³ Ph/MeV	11 x 10³ Ph/MeV	8-10 x 10³ Ph/MeV	15-25 phe/MeV	24 x 10³ Ph/MeV
Integrated light output compared to NaI:Tl	-	20 % NaI:Tl	40 % NaI:Tl	70 % NaI:Tl	80 % NaI:Tl	66 % NaI:Tl	-	15-20 % NaI:Tl	-	75 % NaI:Tl