| Parameters | ||
| SP101 | ZnS(Ag) | |
| Substrate Materials | 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) | 8~10 | |
SP122 series plastic scintillators are developed by Shanghai North Optics for low energy γ-ray detection. The substrate of SP122 is our plastic scintillator SP101, a ZnS(Ag) layer is painted on the surface of the plastic scintillator SP101, and the usual thickness of the ZnS(Ag) layer is 8-10mg/cm². Advanced and sophisticated processing is used to make the ZnS(Ag) painting, the final scintillators have excellent homogeneity and uniformity. SP122 can detect γ-ray with energy as low as 40KeV.