BGO and LYSO Crystals

BGO and LYSO Crystals

Our selection of scintillator crystals offers solutions to a wide range of applications, including the following:

  • Radiation detector modules for medical imaging
  • Industrial CT
  • Medical XCT
  • Positron emission tomography (PET)
  • High energy physics
  • Security scanning
  • Oil well logging
  • Various research applications

Additionally, we can offer a variety of related services, such as:

  • Volume crystal growth
  • Volume fabrication
  • Detector array fabrication
  • Module assembly
  • Crystal development

Properties Comparison for BGO and LYSO

Properties BGO LYSO
Density (g/m3) 7.13 7.3
Melting Point (°C) 1050 2047
Index of Refraction 2.15 1.82
Radiation Length (cm) 1.10 1.16
Attenuation (cm-1) 0.96 0.87
Decay Constant (ns) 300 50
Light Yield (%) Nal (TI) 25 75
Photofraction (%) 40 30
Energy Resolution (511 kev,%) 16 20
Radioactivity No Yes


Gamma-ray and X-ray detectors such as PET, well logging, and high energy physics applications.

Features Requirements of scintillation crystals
Stopping power Dense and high absorption coefficient for gamma-ray.
Scintillation properties High light output and short decay time, colorless and clear
Uniformities Excellent energy resolution and uniform light output.
Temperature response Small decrease in light output at 100°C
Radiation hardness Almost no degradation in scintillation properties at 10*6 gray.

BGO Crystal

BGO, (Bismuth germinate Bi4Ge3O12) is the crystalline form of an inorganic oxide with cubic eulytine structure, colorless, transparent, and insoluble in water. When it is exposed to radiation of high energy particles or gamma-rays, x-rays, it emits a green fluorescent light with a peak wavelength of 480nm. With its elevated stopping power, high efficiency scintillation, first-rate energy resolution and non-hygroscopes, BGO is an excellent scintillation material and is ideal for a wide range of applications in high energy physics, nuclear physics, space physics, nuclear medicine, geological prospecting and other industries.


Diameter 2″ or 3″
Length 1″ or 6″
Orientation <110> , <100>, <001>

Physical Properties of BGO

Density (g/m3) 7.13
Melting point (°C) 1050
Parameter of crystal cell (A) 10,518
Refractive index 2.15
Radiation length (cm) 1.1
Peak of fluorescence spectra (nm) 480
Decay time (ns) 300
Relative light output (%) 10-14Nal (TI)
Energy resolution (511 kev,%) 20

LYSO Crystal

LYSO crystal is an ideal generation scintillator crystal. LYSO (Cerium-doped Lutetium Yttrium Orthosilicate.) LYSO crystal has the advantages of high light output and density, quick decay time, excellent energy resolution and low cost. These properties make LYSO an ideal candidate for a range of ray detection applications in nuclear physics and nuclear medicine, which require higher, improved timing resolution and superior energy revolution.

We can provide LYSO in any volumes required and can supply finished pixel or pre-assembled customer-specific arrays or module configurations.

Physical Properties Of LYSO

Density (g/cm3) 7.4
Effective Atomic Number 66
Radiation Length (cm) 1.10
Decay Constant (ns) 40-44
Peak Emission (nm) 428
Light Yield (Relative BGO=100%) 190
Index of Refraction 1.82
Peak excitation (nm) 375
Radiation Hardness (rad) >106
Melting Point (°C) 2050
Hardness (Mohs) 5.8
Cleavage None
Hygroscopicity No