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BGO

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BGO crystal (chemical formula Bi4Ge3O12) is a scintillation crystal with excellent comprehensive performance. As a new generation of scintillation crystals, BGO is widely used in high-energy physics experiments such as the European Nuclear Research Institute (CERN) large-scale electron-positron collider.

BGO crystal exhibits stable physical and chemical properties, high mechanical strength, high density, high refractive index, and resistance to harsh environments. It shows excellent scintillating performance, for example, high scintillating efficiency, high light yield, fast decay time. Its energy resolution is about 10%.  BGO crystals are widely used in photomultiplier tubes, photoelectric counters, scintillation screens and other devices. Which is used to detect high-energy particles, such as X-rays, γ-rays, etc. The scintillation characteristics of BGO changes linearly with temperature. Combined with digital signal processing (DSP), it can work under harsh conditions. With small volume, it can work stably under refrigeration.

 

Features Applications
  • High density and atomic number
  • High light yield
  • Fast decay time
  • Chemically inert
  • No hygroscopicity
  • Positron emission tomography (PET)
  • High-energy physics
  • Nuclear medicine
  • Geological prospecting
  • Gamma pulse spectroscopy

 

MATERIAL PROPERTIES

PropertiesValue
Density7.13 g/cm³
Melting Point1050℃
Refractive Index2.15
Effective Atomic Number73
Hardness5 Mohs
HygroscopicityNo
Thermal Expansion Coefficient7 x 10-6/°C
Crystal structurecubic

SCINTILLATOR PROPERTIES

PropertiesValue
Wavelength480 nm
Lower Wavelength Cutoff320 nm
Decay Time300 ns
Light Output8000–10000 photons/MeV
Photoelectron Yield15–20% ∝ NaI(Tl)
Temperature Response-1.2%/°C
Afterglow0.005% @3 ms
Energy Resolution10.00%
Radiation length for 511KeV1.1 cm

Excitation curve and energy resolution curve

X-Ray excited luminescence curve
X-Ray excited luminescence curve
Light output curve & Energy resolution curve
Light output curve & Energy resolution curve

PMT:R1306 ; Reflector: Teflon(0.8mm); Radiation source: Cs137 HV:650V

闪烁体BGO-PMT:R1306 ; Reflector: Teflon(0.8mm); Radiation source: Cs137 HV:650V
闪烁体BGO-PMT:R1306 ; Reflector: Teflon(0.8mm); Radiation source: Cs137 HV:650V

Related application(s) with BGO:

Industrial CT γ-ray detection
Medical CT PET

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