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Bismuth Germanate - BGO Scintillator Crystals


Bismuth Germanate - BGO - BiGeO₁₂ is a highly effective gamma-ray absorber as a result  of its high

density and high Z characteristics.


BGO scintillator crystals have:



BGO scintillator crystals have the following issues which should be noted. They:



BGO scintillator crystals are useful in diverse applications such as:







Properties

Optical/Scintillation

Units

Value

Wavelength (Max. Emission)

nm

480

Wavelength Range

nm

350 - 650

Decay Time

ns

300

Light Yield

photons/keV

8 - 10

Photoelectron Yield

% of NaI(Tl)

15 - 20

Radiation Length

cm

1.1

Optical Transmission

µm

0.15 - 12.5

Transmittance

%

>90 (0.35 - 9µm)

Refractive Index


2.15 (@480nm

Reflection Loss/Surface

%

6.8

Neutron Capture Cross-section

barns

1.47

Properties

Mechanical

Units

Value

Density

g/cm³

7.13

Atomic Number (Effective)


74

Melting Point

ºK

1323

Thermal Expansion Coeff.

C⁻¹

7.0 x 10‾⁶

Cleavage Plane


None

Hardness

Mho

5

Hygroscopic


No

Solubility

g/100gH0

N/A

BGO Scintillator Crystals - Sizes


BGO Scintillator Crystals - Properties


Diameters:  Up to 75mm

Lengths:      Up to 300mm






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Further Reading / Publications (Click for links)


BGO - Wikipedia

BGO - Details - Refractive Index

BGO - PET Application

BGO - PET Application

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