| Substrate Materials | Parameters | |
| SP102 | ZnS(Ag) | |
| Polystyrene | ZnS(Ag) | |
| Density（g/cm3） | 1.023 | 4.1 |
| Refractive Index | 1.58 | |
| Light Output (related to anthracene crystals) | 64% | 280% |
| Emission Peak Wavelength (nm) | 423 | 450 |
| Decay Time (ns) | 2.4 | 200 |
| Operation Temperature Range（℃） | -40～55 | -40～55 |
| Thickness of Painting Layer（mg/cm2） | 4.5 | |
Hangzhou Shalom EO has developed the SP121 (Equal to EJ444) series plastic scintillators, which are suitable for both α-ray and β-ray detection. A ZnS(Ag) layer are painted on the surface of our plastic scintillator SP102 with the usual ZnS(Ag) layer thickness of 4.5mg/cm2. While plasti scintillator SP102 is for β-ray detection with peak emission wavelength of 423nm, and ZnS(Ag) layer is for α-ray detection with peak emission at 450nm, the designed thickness of ZnS(Ag) layer are selected to absorb α-ray just exactly. An advanced and sophisticated processing are used to make the ZnS(Ag) painting, which makes the final scintillators has an excellent homogeneity and uniformity.
