GOS (Gd2O2S, gadolinium oxysulfide) has excellent characteristics such as high light output, high density, short afterglow, etc., and is widely used in medical CT and security CT detectors. GOS is a hexagonal crystal with a wide bandgap structure (4.4~4.8eV), high chemical stability, and is used as a scintillator matrix material. Gd2O2S: Pr, Ce ceramic scintillator has high conversion efficiency for X-rays, and its decay time (t1/10 = 5.5 us) is short, which can realize repeated imaging in a short time. It can be used not only in medical imaging equipment but also in color television picture tubes.
Parameter
Material Features
| Property | Value |
| Materials | Ge2O2S |
| Density (g/cm3) | 7.34 |
| Crystal structure | Hexagonal |
| Lattice parameters | a = b = 3.85827Å, c = 6.666659 Å |
| Hygroscopicity | No |
| Cleavage plane | No |
| Solubility (g/100gH2O) | N/A |
Scintillator Properties
| Property | Value |
| Wavelength(Max. emission) (nm) | 510 |
| Wavelength range (nm) | 400-2000 |
| Decay time | 5.5 |
| Wide-Gap (eV) | 4.6-4.8 |
| Luminescence intensity (keV) | 27.5 |
| X-ray attenuation coefficient (cm-1) | 52 at 70 keV 0.80 at 500 keV |
| Relative light output (%) | 80 |
| Afterglow (%) | < 0.01 |
| Radiation damage (%) | -3 |
Spertrum
Feature
- High luminous efficiency
- Low afterglow
- High light output
- High X-ray absorption efficiency
Application
- X-ray CT
- X-ray microscope
- Laser material
