BGO Array
BGO (Bi4Ge3O12) bismuth germanate crystal is one of the most common oxide scintillation materials. It exhibits stable physical and chemical properties, high mechanical strength, high density, high refractive index, and resistance to harsh environments. With its high stopping power, high scintillation efficiency, good energy resolution and non-hygroscopic, BGO is a good scintillation material for a wide range of applications in high energy physics, space physics, medicine, geological exploration and other industries.
OST Photonics can manufacture BGO arrays according to our customers’different design options in terms of pixel size, the number of pixels, reflector materials and crystal surface finishes. We offer a variety of design options and reflector materials to optimize the array performance. Our manufacturing process can ensure high light output as well as excellent pixel to pixel uniformity with minimal crosstalk. Furthermore, offset BGO arrays (multilayer BGO arrays) are also available upon requests.
Applications of BGO Array
Positron emission tomography (PET)
High-energy physics
Nuclear medicine
Geological exploration
Gamma-ray spectroscopy
Advantages of BGO Array
High Z
Good photopeak to Compton ratio
The scintillator of choice for neutron activation analysis and active Compton shields
High density
Specifications of BGO Array
Number of pixels: 4x4; 8x8; 16x16; 24x24; 30x30 etc. (customized upon request)
Minimal pixel size: 0.2 mm x 0.2 mm
Reflector Types and Thicknesses of BGO Array
|
Material |
Thickness of reflector material + adhesive |
|
BaSO4 |
≥0.1 mm |
|
ESR |
|
|
E60 |
|
|
TiO2 |
≥0.1 mm |
Properties of BGO Crystal
|
Density [g/cm3] |
|
|
Melting point [K] |
1323 |
|
Thermal expansion coefficient [C-1] |
7 x 10-6 |
|
Cleavage plane |
None |
|
Hardness (Mho) |
5 |
|
Hygroscopic |
No |
|
The wavelength of emission max. [nm] |
480 |
|
Refractive index @ emission max |
|
|
Primary decay time [ns] |
300 |
|
Light yield [photons/keVγ] |
8-10 |
|
Photoelectron yield [% of NaI(Tl)] (for γ-rays) |
15–20 |
|
Afterglow |
Quality Control for BGO Array:
Dimension testing
Relative light output testing
Pixel light output uniformity: ≤10%；≤20%；≤30% or on request
Energy resolution testing
Scatter map.
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