Description
Key Advantages
Exceptional Light Output (56,000 Photons/MeV)
One of the highest photon yields among scintillators, emitting peak light at 550 nm (green-yellow), ensuring strong signal-to-noise ratios. This high output enables precise energy measurement and enhances image clarity in low-dose applications.
High Detection Efficiency
With a density of 4.51 g/cm³ and effective stopping power for X-rays and gamma rays, CsI efficiently absorbs radiation across a broad energy range (from keV to MeV), making it versatile for diverse detection needs.
Superior Energy Resolution
Combined with its high light output, CsI offers excellent ability to distinguish between radiation energies, critical for identifying specific isotopes or analyzing mixed radiation fields.
Low Afterglow (0.5–0.8%)
Minimal residual light emission after excitation, ensuring clear signal separation in high-frame-rate applications (e.g., fast CT scans or rapid security screening), reducing image artifacts.
Mild Hygroscopicity
Exhibits only slight moisture sensitivity, requiring basic protective coating (e.g., thin film) for long-term stability in humid environments—simpler than the hermetic sealing needed for highly hygroscopic scintillators like NaI(Tl).
Technical Specifications
CsI (Cesium Iodide) has a density of 4.51 g/cm³, a melting point of 894 K (621°C), a hardness of 2 Mohs, a refractive index of 1.79, a light yield of 56,000 photons/MeV, a decay time of 1020 ns, an emission wavelength of 550 nm (green-yellow), an afterglow (at 50 ms) of 0.5–0.8 %, and slight hygroscopicity.
