BGO (Bismuth Germanate)
Keywords:
Scintillation Crystals
- Product Introduction
- Key advantages
- Application areas
- Product Features
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- Commodity name: BGO (Bismuth Germanate)
Bismuth Germanate (BGO) ,with chemical formula Bi₄Ge₃O₁₂, is a colorless, transparent oxide crystal with a cubic crystalline structure. As an inorganic scintillating material, it is characterized by high density, high specific gravity, insolubility in water, non-hygroscopic properties, low afterglow, and exceptional radiation-stopping capability, along with strong radiation resistance.
Product Introduction
Bismuth Germanate (BGO) ,with chemical formula Bi₄Ge₃O₁₂, is a colorless, transparent oxide crystal with a cubic crystalline structure. As an inorganic scintillating material, it is characterized by high density, high specific gravity, insolubility in water, non-hygroscopic properties, low afterglow, and exceptional radiation-stopping capability, along with strong radiation resistance. When excited by high-energy particles or intense radiation—such as X-rays or gamma rays—it emits bright green fluorescence peaking at 480 nm. Thanks to its superior properties, including high stopping power, outstanding scintillation efficiency, exceptional energy resolution, and inherent non-hygroscopic nature, BGO crystals have become a highly valued scintillator with critical applications across diverse fields: from high-energy physics and nuclear physics to space science, nuclear medicine, geological exploration, environmental monitoring, security screening, and even various industrial sectors.
Key advantages
- Luminescent Properties
- Radiation Resistance
- Fast Decay Time
- Fine Energy Resolution
- Non-hygroscopicApplication
- High-Energy Physics Experiments
- Nuclear Medicine
- Environmental Monitoring
- Space Science
- Large Electron-Positron Colliders
- Dark Matter DetectionProduct Features
Material Properties
Molecular Formula
Bi₄Ge₃O₁₂
Crystal Structure
Cubic
Lattice Constant
a=1.0518 Å
Growth Method
Czochralski
Density
7.12 g/cm³
Mohs Hardness
5 Mohs
Radiation Length
1.1cm
Transparency Range
350~5500 nm
Light Output
10~14% Nal (Tl)
Fluorescence Spectrum Peak
480~510 nm
Decay Time
300 ns
Energy Resolution
20 (511 keV, %)
Refractive Index
2.098@632.8 nm
Melting Point
1050°C
Product Processing Indicators
Orientation
<001>+/-0.5°
Effective Aperture
>90%
Dimensions
Customized to Customer Specifications
Diameter Tolerance
+0/-0.05 mm
Length Tolerance
±0.2mm
Chamfer
≤0.2×45°
Surface Quality
10-5 S-D
Flatness
≤λ/10@632.8 nm
Wavefront Distortion
≤λ/8@632.8 nm
Parallelism
<20"
Perpendicularity
≤15′
Chipped Edge
<0.1 mm
Coating
Customized to Customer Specifications
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- Luminescent properties
- Radiation resistance
- Short decay time
- Fine energy resolution
- Non-hygroscopic -
- High-energy physics experiments
- Nuclear Medicine
- Environmental Monitoring
- Space Science
- Large Electron-Positron Collider
- Dark Matter Detection -
Material Properties Molecular formula Bi4Ge3O12 Crystal structure Cubic crystal system Lattice constant a = 1.0518 Å Production method Tiraf Method Density 7.12g/cm3 Mohs Hardness 5Mohs Radiation Length 1.1cm Transmittance range 350 nm ~ 5500 nm Relative Light Output (%) 10-14 Nal (Tl) Fluorescence spectrum peak 480–510 nm Recession time 300ns Energy resolution 20 (511 keV, %) Refractive index 2.098 @ 632.8 nm Melting point 1050°C Product Processing Metrics Directional <001> +/- 0.5° Effective Aperture >90% Dimensions Customized to customer specifications Diameter Tolerance +0 / -0.05 mm Length Tolerance ±0.2mm Protective Chamfer ≤0.2 × 45° Surface finish 10-5 S-D Flatness ≤λ/10 @ 632.8 nm Analyzing wavefront distortion ≤λ/8 @ 632.8 nm Parallelism <20" Verticality ≤15′ Chipped edge < 0.1 mm Coating Customized to customer specifications
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