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Bi4Ge3O12
(Bismuth Germanate or BGO)
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Bismuth germanate(BGO for short), is
a multifunctional crystal. As a scintillator, it has such advantages as
high radiation hardness, high scintillation efficiency, good energy
resolution and no hygroscopic, and used in particle physics, nuclear
physics, aerospace physics, nuclear medicine, geology exploring and other
industries. At present, BGO crystal is used widely in nuclear medical
imaging, for instance, in PET.
Red Optronics can supply BGO, either Bi12GeO20
or Bi3Ge4O12
,up to
30�40�250 mm3 (cuboids) or φ50�100mm3
(cylinder).
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Physical and
Chemical Properties
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Space
group
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Density
(g/cm3)
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7.13
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Hardness
(mho)
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5
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Thermal
expansion coefficient
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7.0
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Radiation
length (cm)
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1.12
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Molere
radius (cm)
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2.7
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Decay
constant (ns)
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300
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Peak
emission (nm)
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480
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Light
output relative to NaI(Tl) (%)
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15~20
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Lower
wavelength cutoff (nm)
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320
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Refraction
index at emission maximum
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2.15
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After
glow (after 3ms) (%)
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<
0.005
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Temperature
response (K-1)
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0.01
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Melting
point (�C)
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1050
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Hygroscopic
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No
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