Undoped Cesium Iodide CsI Pure Scintillation Crystal
Undoped Cesium Iodide CsI(Pure) Scintillation Crystal
Undoped cesium iodide or CsI(pure) has high density, sufficiently small radiation length (1,86 sm) and much lower hygroscopicity than CsI(Tl). CsI(pure) has fluorescence spectrum with maximum at 315 nm with the short decay time (about 16 ns) and long-wave component which allows effectively using this scintillation material for medium- and high-energy physics experiments. Therefore, CsI(pure) can be used when high counting rate is required. CsI(pure) differs from CsI(Tl) and CsI(Na) scintillators by a much faster response and lower light yield.
Properties:
| Density(g/cm3) | 4.51 |
| Melting Point (K) | 894 |
| Thermal Expansion Coefficient (K-1) | 54 x 10-6 |
| Cleavage Plane | None |
| Hardness (Mho) | 2 |
| Hygroscopic | Slightly |
| Wavelength of Emission Maximum (nm) | 550 |
| Lower Wavelength Cutoff(nm) | 320 |
| Refractive Index at Emission Maximum | 1.79 |
| Primary Decay Time (ns) | 1000 |
| Afterglow (after 30ms) [%] | 0.5 – 0.8 |
| Light Yield (photons/keV) | 52- 56 |
| Photoelectron Yield [% of NaI(Tl)] (for γ-rays) | 45 |
Advantage:
Well matched with PD
Good stopping power
Good energy resolution/ low afterglow
Application:
Gamma detector
X-ray imaging
Security inspection
High energy physics
SPECT
Product shots:
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