GOS
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 |
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Material Features
| Property | Value |
| Materials | Ge2O2S |
| Density (g/cm3) | 7.34 |
| Crtystal structure | Hexagonal |
| Lattice parameters | a=b=3.85827Å c=6.666659Å |
| Hygroscopic | No |
| Cleavage plane | No |
| 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
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Related application(s) with GOS:
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| X-ray detection | Medical CT |
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