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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