純碘化銫，Caesium Iodide (CsI)
純碘化銫晶體是一種具有快衰減閃爍特性的新型輻射探測材料, 純碘化銫快發光的衰減時間是2-3ns和約30ns，在伽馬射線、中子和其它輻射探測技術中有重要的應用前景。此外，該晶體的紅外透過范圍寬，也可用作紅外光學器件。
Properties
Value
Apparent Elastic Limit (MPa)
5.6 (810psi)
Bulk Modulus (K) (GPa)
12.67
Cleavage Planes
None
Decay (μs)
0.03 & 0.1
Density (g.cm-3)
4.51
Dielectric Constant
5.65 at 1MHz
Elastic Coefficient C11
24.6
Elastic Coefficient C12
6.7
Elastic Coefficient C44
6.24
Emission Spectral Range (nm)
250 to 500
Hardness (knoop) (100) direction
20.0
Melting Point (°C)
621
Molecular Weight
259.83
Peak Scintillation Wavelength (nm)
230
Photons/MeV
16,800
Poisson Ratio
0.214
Radiation Length (cm)
1.86
Reflection Loss (%)
13.6 at 11μ (2 surfaces)
Refractive Index
1.78 at 10μ
Shear Modulus (G) (GPa)
6.24
Solubility (g/100g H2O)
44.0 at 273K
Specific Heat Capacity (J·kg·m-1·K-1)
201
Structure
Cubic
Thermal Coefficient of Light Output (%·K-1)
18.85 X 10-6
Thermal Conductivity (W·m-1·K-1)
1.1 at 298K
Thermal Expansion (K-1)
48.3 X 10-6 at 293K
Transmission Range (μ)
0.25 at 55.0
Youngs Modulus (E) (GPa)
5.3