Fig. 1.
Fig. 2.
Fig. 3.
Fig. 4.
Fig. 5.
Fig. 6.
Fig. 7.
Fig. 8.
List of parameters for typical scintillation crystals [22, 23]
| Crystal | Density (g/cm3) | Melting point (°C) | Irradiation length/cm | Emission wavelength/ nm | Optical production (ph/MeV–1) | Decay time/ns | Energy resolution (@662 keV 137Cs) /% |
|---|---|---|---|---|---|---|---|
| NaI(Tl) | 3.67 | 651 | 2.59 | 410 | 40 000 | 230 | 6.5 |
| BGO | 7.13 | 1 050 | 1.12 | 480 | 3 600 | 300 | 20 |
| LSO(Ce) | 7.41 | 2 050 | 1.14 | 440 | 30 000 | 42 | 9.0 |
| BaF2 | 4.89 | 1 354 | 2.03 | 300/220 | 8 400/1 080 | 630/0.9 | 16 |
| LaCl3(Ce) | 3.90 | 875 | — | 350 | 50 000 | 24 | 3.1 |
| LaBr3(Ce) | 5.30 | 783 | — | 360 | 70 000 | 16 | 2.6 |
| CeBr3 | 5.20 | 732 | — | 380 | 60 000 | 17 | 4.0 |
Peak channel addresses and energies (0–1332 keV) for different detector sizes before and after correction
| Detector crystal size (mm3) | Linear deviation before correction (%) | Corrected linear deviation (%) |
|---|---|---|
| 51 × 51 × 5 | 1.9 | 1.1 |
| 102 × 102 × 5 | 2.1 | 1.7 |
| 51 × 51 × 8 | 1.6 | 1.4 |
| 51 × 51 × 11 | 2.1 | 1.2 |
Emitted ray energy
| Label number | A | B | C | D | E | F | G | H | I | J |
|---|---|---|---|---|---|---|---|---|---|---|
| Energy (keV) | 59 | 88 | 122 | 140 | 279 | 365 | 662 | 779 | 834 | 1332 |