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BGO Arrays

  • No hygroscopic
  • Mechanical ruggedness
  • High density and atomic number
  • Good radiation hardness

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Basic Properties:

Melting Point(K) 1323 Density (g/cm3) 7.13
Thermal Expansion Coefficient(C-1) 7 x 10-6 Cleavage Plane None
Hardness(Mohs) 5 Hygroscopic No
Wavelength of Emission Max.(nm) 480 Lower Wavelength Cutoff(nm) 320
Refractive Index @ Emission Peak 2.15 Emission Peak Wavelength(nm) 550
Lower Wavelength Cutoff(nm) 330 Primary Decay Time(ns) 300
Light Yield((photons/keVγ) 8-10 Photoelectron Yield [% of NaI(Tl)] (for γ-rays) 15-20
Temperature Response -1.2%/℃ Neutron Capture Cross-section 1.47b
Afterglow @ 20ms 150ppm

Bismuth germanate Bi4Ge3O12 (BGO) is one of the most widely used heavy oxide scintillation materials. BGO has a high atomic number (83) of the heavy component Bi and a high density of the material (7.13 g/cm3). The luminescence spectrum of BGO scintillators has a maximum in the visible spectral range at 480 nm. Among advantages of BGO crystals, one should note their non-hygroscopicity, mechanical and radiation stability. BGO crystals are stable under radiation doses of up to 103 rad. 
Another important advantage of BGO crystals is a nearly complete absence of afterglow. The decay time of the main scintillation component of BGO at room temperature is 300 ns. 
All these advantages of BGO crystal are successfully used in experiments of high-energy physics, for creation of small-sized tomography devices and an active protection from background activity. 
Dimensions of BGO crystal array and pixel are customized based on request.


  1. Growth method: Bridgman
  2. Formula: Bi4Ge3O12
  3. Maximum dimension: ∅ 75 mm x 300 mm
  4. Available items: single crystals and arrays

Application Notes:

  1. Environment monitoring – gamma-radiation monitoring
  2. Nuclear medicine –  PET
  3. Security control – radiation isotope identification devices
  4. Geophysics – well-logging
  5. Industrial – health physics, neutron activation analysis, non-destructive testing (defectoscopy)
  6. HEP and Astrophysics – eletromagnetic calorimeter and spectrometers