BGO Scintillation Crystal | High Density Detector Material
BGO Scintillation Crystal for High-Density Gamma Detection
BGO scintillation crystal, or bismuth germanate scintillator, is a dense inorganic scintillation material used where gamma-ray stopping power, compact detector volume, and non-hygroscopic handling are important. With a density of about 7.13 g/cm3 and high effective atomic number, BGO is widely considered for anti-Compton shields, high-energy physics calorimeters, PET detector designs, well logging tools, and security inspection systems.
ATR Crystal supplies custom BGO crystals as polished blocks, cylinders, annular shapes, well-type components, and pixelated arrays. Dimensions, surface finish, reflector, optical coupling, readout matching, and inspection requirements can be reviewed according to your drawing or detector application.
For broader material comparison, review our scintillation crystals, BGO scintillator arrays, LYSO(Ce) crystal, NaI(Tl) scintillation crystal, and GAGG(Ce) scintillation crystal.
BGO Scintillator Selection Note
BGO scintillator, or bismuth germanate Bi4Ge3O12, is selected when a detector needs high density, strong gamma-ray stopping power, non-hygroscopic handling and no lutetium intrinsic background. It is often reviewed for anti-Compton shields, gamma-ray veto detectors, high-energy physics calorimeters, geological exploration tools and compact absorber designs.
BGO is not usually chosen for the fastest timing or highest light output. Compared with LYSO(Ce), BGO has lower light yield and slower decay time, but it can be more suitable when low intrinsic background and compact stopping power are more important. For a side-by-side material comparison, read our LYSO vs BGO scintillator selection guide.
Applications of BGO Crystal
High-energy physics calorimeters and gamma detectors
Anti-Compton shields for gamma spectroscopy systems
Geological exploration and well logging instruments
PET detector modules and legacy imaging systems
Security inspection and radiation detection equipment
Space physics and astroparticle detector projects
Advantages of BGO Scintillation Crystal
- High stopping power7.13 g/cm3 density and high effective atomic number help absorb gamma rays in a compact detector volume.
- No Lu-176 intrinsic backgroundBGO does not contain lutetium, making it useful for applications where LYSO/LSO intrinsic background is undesirable.
- Non-hygroscopic materialBGO does not require hermetic sealing for moisture protection, simplifying many detector assemblies.
- Good mechanical handlingBGO can be processed into blocks, cylinders, annular components, and array elements according to the required geometry.
- Useful for shielding and veto detectorsThe material is widely used in anti-Compton and gamma-ray veto applications because of its density and stopping efficiency.
- Custom geometry supportATR Crystal can review polished blocks, well shapes, pixelated arrays, reflector selection, and optical coupling requirements.
BGO Scintillation Crystal Specifications
The following table summarizes typical BGO scintillation crystal properties for detector design review.
| Parameter | Typical Value |
|---|---|
| Chemical formula | Bi4Ge3O12 |
| Crystal structure | Cubic |
| Density | 7.13 g/cm3 |
| Effective atomic number | Approx. 73 |
| Melting point | Approx. 1,050 C |
| Mohs hardness | Approx. 5.0 |
| Cleavage plane | None |
| Hygroscopicity | Non-hygroscopic |
| Light yield | Approx. 8,000-8,500 photons/MeV |
| Decay time | Approx. 300 ns |
| Emission peak | Approx. 480 nm |
| Refractive index | Approx. 2.15 at 480 nm |
| Energy resolution | Approx. 10-12% at 662 keV |
| Intrinsic background | No Lu-176 intrinsic background |
Available BGO crystal formats and customization options.
| Format | Details |
|---|---|
| Polished blocks / cubes | From small detector elements to large blocks for calorimeter projects |
| Cylinders | Standard diameters and custom lengths for well logging and gamma detection systems |
| Annular / well shapes | Custom machined well configurations for anti-Compton shield designs |
| Pixelated arrays | Custom 1D and 2D arrays with reflector options for imaging and detector modules |
| Surface finish | All-side polished, lapped, roughened, or painted with diffuse reflector on request |
| Reflector options | BaSO4, ESR, PTFE, or project-specific reflector design |
BGO vs. LYSO vs. NaI(Tl)
BGO is often selected when density, compact stopping power, and low intrinsic background are more important than very fast timing or maximum light output. LYSO(Ce) is stronger for TOF-PET timing, while NaI(Tl) is widely used for PMT-based gamma spectroscopy.
| Property | BGO | LYSO(Ce) | NaI(Tl) |
|---|---|---|---|
| Density | 7.13 g/cm3 | 7.1 g/cm3 | 3.67 g/cm3 |
| Light yield | Approx. 8,000-8,500 photons/MeV | Approx. 33,000 photons/MeV | Approx. 38,000 photons/MeV |
| Decay time | Approx. 300 ns | Approx. 36 ns | Approx. 250 ns |
| Energy resolution at 662 keV | Approx. 10-12% | Approx. 8% | Approx. 6-7% |
| Emission peak | 480 nm | 420 nm | 415 nm |
| Hygroscopicity | Non-hygroscopic | Non-hygroscopic | Highly hygroscopic; sealing required |
| Intrinsic background | No Lu-176 intrinsic background | Contains natural Lu-176 background | No Lu-176 intrinsic background |
| Typical strength | Stopping power, anti-Compton shields, low-background applications | Fast timing and compact PET detector modules | Gamma spectroscopy and high light output |
Custom BGO Crystal and Array Options
ATR Crystal can review BGO crystal drawings for custom block size, cylinder diameter, annular geometry, well shape, pixel pitch, reflector material, surface finish, and optical coupling requirements. For array projects, compare this page with the BGO scintillator array page to define pixel layout, reflector, and detector integration details.
