Scintillators
| Scintillator | Atomic number Z effective | Density ρ (g/cm3) | Decay time τ (ns) | Wavelength λ (nm) | Relative light output (% of NaI(Tl)) |
|---|---|---|---|---|---|
| NaI(Tl) | 50 | 3.67 | 200 | 415 | 100 |
| CsI(Tl) | 54 | 4.5 | 1,000 | 550 | 45 (118*) |
| CsI(Na) | 54 | 4.51 | 630 | 420 | 85 |
| LaBr3:Ce | 47 | 5.3 | 25 | 360 | 160 |
↵* Represents total light output. Because of the long wavelength of the scintillation, the effective signal for CsI(Tl) is only 45% of NaI(Tl).