Introduction:
Nal(TI) crystal is the most widely used scintillation material, and among the scintillators, it has very excellent light output(in coincident with maximum efficiency region of PMT with bialkali
photocathodes).
Key Features: Applications:
High light output High energy physics
No obvious self absorption Oil well logging,Geologic survey
Available in single crystal Environmental monitoring
Matched well with photomultiplier tubes Isotopes identification
Properties:
| Density(g/cm3) | 3.67 |
| Melting point(℃) | 651 |
| Cleavage plane | <100> |
Hardness (Mohs) | 2 |
Decay time | 250 |
Index of Refraction | 1.85 |
| Wavelength of emission max(nm) | 415 |
Light yield (Photons/MeV) | 38000 |
Hygroscopic | Yes |
Related application(s) with NaI(Tl):
Item | Logging While Drilling | Conventional Logging | ||
| Application | Density | Natural gamma counting | Density | Natural gamma counting |
| Crystal size(mm) | 1) Short distance:φ12.7x12.7 2) Long distance:φ20.7x24.8 | φ21.5x125 | 1) Short distance:φ20.6x12.7 2) Long distance:φ35.2x42.4 | φ40x200 |
| Capsulation | Sapphire window+Titanium alloy shell+Hot forged polycrystal | High temperature sintering window+Stainless steel housing+Hot forging polycrystal | ||
Energy Resolution (%) (Cs137) | PHR(25℃):≤12 PHR(175℃):≤16 | PHR(25℃):≤15 PHR(175℃):≤20 | PHR(25℃):≤12 PHR(175℃):≤16 | PHR(25℃):≤15 PHR(175℃):≤20 |
