Ce:YAP is a fast scintillation crystal with excellent performance. It has high light output, fast decay time, good thermal stability and mechanical properties, and stable chemical properties. Ce:YAP scintillation crystals are mainly used in fast gamma-ray detection, animal PET scanning systems, electronic imaging (SEM), high-energy physics, low- and medium-energy X-ray two-dimensional imaging and other fields.
Physical and chemical properties
| Property | Ce:YAP | LFS | LYSO | BGO | CsI(Tl) | NaI | |
| Crystal System | Orthogonal | Monoclinic | Monoclinic | Cubic | Cubic | Cubic | |
| Density (g/cm3) | 5.4 | 7.4 | 7.1 | 7.1 | 4.51 | 3.7 | |
| Melt Point (°C) | 1875 | 2050 | 2047 | 1050 | 894 | 651 | |
| Effective Atomic Number | 39 | 64 | 66 | 74 | 54 | 51 | |
| Peak Wavelength (nm) | 370 | 425 | 420 | 480 | 550 | 410 | |
| Refractive Index | 1.96(a) | 1.81 | 1.81 | 2.15 | 1.79 | 1.85 | |
| Hardness (Mohs) | 8.6 | 5.8 | 5.8 | 4.5 | 2 | 2 | |
| Cleavage | Yes | No | No | No | No | (100) | |
| Deliquescence | No | No | No | No | Yes | Yes |
Advantages of Ce:YAP crystal
good light output temperature characteristics, fast decay time, high energy resolution, high time resolution, stable chemical performance
Technical indicators
| Property | Ce:YAP | LFS | Ce:LYSO | BGO | NaI |
| Relative Light Output (%) | 70 | 75 | 70-75 | 15 | 100 |
| Decay Time (ns) | 25 | <40 | 40 | 300 | 230 |
| Energy Resolution (%) | —— | 10 | 10 | 12 | 7.8 |
| Irradiation hardness (rad) | 106 | 108 | 108 | 102-3 | 10 |
| Afterglow（6ms after, %） | No | No | No | No | 0.3-0.5% |
