physical and scintillation properties...
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Scintillators Ce:Gd3Al2Ga3O12
(Ce:GAGG) Ce:Lu1.8Y0.2SiO5
(Ce:LYSO) Bi4Ge3O12
(BGO) Ce:LaBr3
Density (g/cm3) 6.63 7.1 7.13 5.08
Light yield (photon/MeV)
57,000 34,000 8,000 75,000
Decay time (ns) 88 (91%) 258 (9%)
40 300 30
Peak emission (nm) 520 420 480 375
Energy resolution (%@662keV)
5.2 (5x5x5mm3 with APD)
10 12 2.6
Hygroscopicity No No No Yes
Cleavage No No No No
Melting point (℃) 1,850 2,150 1,050 783
Contact: [email protected]
Physical and Scintillation Properties
0 100 200 300 400 500 600
1
10
100
1000
Counts
channel
Fe55
LYSO-5mm cubic
GAGG-5mm cubic
cou
nts
channel
0 100 200 300 400 500 600
100
1000
10
1
inte
nsi
ty /
arb
. u
nit
10-1
1
time / nm 0 500 1000 -500
57,000 photon/MeV ΔE/E = 5.2 %
Features - Light yield: 57,000 photon/MeV - Energy resolution: 5.2 % - Non intrinsic radioactivity
Specification - Diameter : < φ55 mm - Length : < 150 mm
Application - PET, PEM - SPECT - CT
FURUKAWA Co.,Ltd. Materials Research Laboratory
1-25-13, Kannondai, Tsukuba-city, Ibaraki, 305-0856, Japan e-mail: [email protected] URL: http://www.furukawakk.co.jp/e_index.htm
Scintillation decay of Ce:GAGG excited by 137Cs
Energy spectra of Ce:GAGG using APD excited by 137Cs
Radioluminescence spectrum of Ce:GAGG excited by Cu Kα X-ray.
88 ns (91 %) 258 ns (9 %)
300 400 500 600 700 800-5
0
5
10
15
20
25
30
Inte
nsity
/ a
rb. unit
wavelength / nm
Ce3+ 4f-5d emission@520 nm
wavelength / nm
300 400 500 600 700 800
inte
nsi
ty /
arb
. u
nit
Scintillators Pr:LuAG Ce:LYSO BGO Ce:LaBr3
Density (g/cm3) 6.73 7.1 7.13 5.08
Light yield (photon/MeV)
22,000 34,000 8,000 75,000
Decay time (ns) 20 40 300 30
Peak emission (nm) 310 420 480 360
Energy resolution (%@662keV)
4.2 10 12 2.6
Hygroscopicity No No No Yes
Cleavage No No No No
Melting point (℃) 2,043 2,150 1,050 783
Physical and Scintillation Properties
Contact: [email protected]
Chemical formula Lu3Al5O12
Structure / Space group Cubic / Ia3d
Density 6.73 g/cm3
Zeff 62.9
Radiation length X0 1.41 cm
Interaction length 23.3 cm
Refractive index 2.03 @310 nm
Hardness (Mohs) 7.5
Fracture toughness 1.1 MPa m1/2
Cleavage plane / H2O solubility No / No
Melting point 2,043 oC
Thermal expansion @RT 8.8 × 10-6 K-1
Thermal conductivity @RT 31 W/mK
Physical Properties of undoped-LuAG
0 100 200 300
Channel
Counts
Lu Kα X-ray Escape peak
ΔE/E = 4.2%
662keV
cou
nts
channel 0 100 200 300
Features - Decay time: < 25 ns - Energy resolution: 4.2 % - Light yield : 2,2000 photon/MeV
Specification - Diameter : < f50 mm - Length : < 135 mm
Application - PET - PEM
FURUKAWA Co.,Ltd. Materials Research Laboratory
1-25-13, Kannondai, Tsukuba-city, Ibaraki, 305-0856, Japan e-mail: [email protected] URL: http://www.furukawakk.co.jp/e_index.htm
Energy spectrum of Pr:LuAG excited by 137Cs (Pr:LuAG sample size: 10 x 10 x 10 mm3)
Contact: [email protected]
Size of scintillator: 0.5 mm x 0.5 mm~ Length of scintillator: 3 mm~ Thickness of reflector: 0.1 mm~
Ce:GAGG Array (rod size: 0.5 x 0.5 x 5 mm3)
FURUKAWA Co.,Ltd. Materials Research Laboratory
1-25-13, Kannondai, Tsukuba-city, Ibaraki, 305-0856, Japan e-mail: [email protected] URL: http://www.furukawakk.co.jp/e_index.htm
310 nm 340 nm 370 nm 410 nm
Teflon - 76 % 90 % 92 %
ESR 23 % 19 % 35 % 93 %
BaSO4-type 94 % 95 % 96 % 97 %
Reflectance for selected reflectors
BaSO4-type reflector has high reflectance even in the UV region.
-Emission wavelength of Pr:LuAG: 310 nm -Thickness of BaSO4 reflector: 0.1 mm
Two- dimensional image of Pr:LuAG scintillator array coupled with PMT H8500
Advantage of BaSO4-type reflector
20 x 20 Pr:LuAG Array
Spots corresponding to each Pr:LuAG rods are clearly resolved.