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Basic Properties:
| Melting Point (°C) | 894 | Density (g/cm3) | 4.51 |
| Cleavage Plane | None | Hardness(Mohs) | 2 |
| Hygroscopic | Yes | Refractive Index at Emission Peak | 1.84 |
| Emission Peak Wavelength | 420 | Lower Wavelength Cutoff(nm) | 300 |
| Decay Time(ns) | 630 | Light Yield(Photons/KeV) | 41 |
| Photoelectron Yield(% of NaI(Tl)) | 85 | ||
Sodium doped Cesium Iodide or CsI(Na) CsI(Na) has a wavelength of emission peak at 420nm and is well matched to the photocathode sensitivity of bialkali photomultiplier and has a light output yielding to 85% of NaI(Tl). Compared to NaI(Tl), it is a relatively soft and plastic material without cleavage plan which makes the material interesting where severe environmental conditions are encountered.
High output γ -ray stopping power
High density and atomic number
Suitable for harsh environmental applications
