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GOS

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GOS (Gd2O2S, gadolinium oxysulfide) has excellent characteristics such as high light output, high density, short afterglow, etc. GOS ceramic belongs to hexagonal system structure. It exhibits chemical inertness. GOS doped with rare earth ion has relatively high light output and extremely low afterglow, saying <0.1% after 3 ms. The emission peaks range from 480-900 nm with spectral sensitivity of silicon photodiodes. It has been widely used for purposes such as CT scanners, security devices and non-destructive testing.

Features Applications
  • High light output
  • Low afterglow
  • high density
  • High X-ray absorption efficiency
  • Chemical inertness
  • X-ray CT
  • X-ray microscope
  • CT scanners
  • Neutron detection

Material Features

PropertyValue
MaterialsGe2O2S
Density (g/cm3)7.34
Crtystal structureHexagonal
Lattice parametersa=b=3.85827Å
c=6.666659Å
HygroscopicNo
Cleavage planeNo
Solubility (g/100gH2O)N/A

Scintillator Properties

Wavelength (Max. emission) (nm)510
Wavelength range (nm)480-900
Decay time 5.5
Wide-Gap (eV)4.6-4.8
Light output (photons/MeV)27000
X-ray attenuation coefficient (cm-1)52 at 70 keV
0.80 at 500 keV
Afterglow (%)<0.01
Radiation damage (%)-3

Spectra

GOS emission spectrumGOS Absorption spectrum

Related application(s) with GOS:

X-ray detection Medical CT

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