YAG:Ce

Yttrium aluminum garnet activated by cerium is a fast scintillator with excellent mechanical and chemical resistance. YAG:Ce scintillation detectors are preferred for electron microscopy, beta and X-ray counting, as well as for electron and X-ray imaging screens.

Key properties

Fast scintillator
Highly universal scintillator
High mechanical resistence
High chemical resistence

Technical parameters

Physical properties
	YAG:Ce	YAP:Ce	LuAG:Ce	CRY 18	LuAG:Pr	LuAP:Ce	BGO	PWO	CRY 19
Density	4.57 g/cm³	5.37 g/cm³	6.73 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	8.5	8.6	8.5	5.8	8.5	-	5	4	-
Index of refraction	1.82	1.95	1.84	1.79	1.84	-	2.15	2.17	1.81
Melting point	1970°C	1875°C	2020°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	rhombic	cubic	monoclinic	cubic	-	cubic	tetragonal symetric	monoclinic
Hygroscopic	NO	NO	NO	NO	NO	NO	NO	NO	NO
Scintillation properties
Wavelength of max. emission	550 nm	370 nm	535 nm	425 nm	310 nm	365 nm	480 nm	420 nm	420 nm
Decay constant	70 ns	25 ns	70 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	3.5 cm	2.7 cm	1.3 cm	2.74 cm	1.3 cm	-	1.1 cm	0.89 cm	2.1 cm
Photon yield at 300 K (27°C)	30 x 10³ Ph/MeV	25 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	40 % NaI:Tl	70 % NaI:Tl	20 % NaI:Tl	80 % NaI:Tl	66 % NaI:Tl	-	15-20 % NaI:Tl	-	75 % NaI:Tl

Luminescence properties

Yellow CIE (0.418; 0.554)	573	535	459	~80	1.83	11.5	7.5
	Emission centroid [nm]	Maximum emission [nm]	Max. of absorption [nm]	Max abs. coefficient [cm-1]	n @633nm [-]	Thermal conductivity T= 25°C [W.m-1 K-1]	Thermal conductivity T= 100°C [W.m-1 K-1]
Yellow CIE (0.434; 0.543)	580	545	460	~80	1.83	8.2	5.7
Other Cryphosphor materials:
Green CIE (0.326; 0.576)	545	510	450	~60	1.84	10.3	7.2
Yellow/Orange CIE (0.453; 0.530)	588	555	460	~60	1.83	7.7	5.4