CaF2:Eu – Europium Doped Calcium Fluoride
In addition to its use as an UV-Vis-IR optical material, Calcium Fluoride’s properties make it ideal for scintillation when doped with Europium.
CaF2:Eu is an attractive scintillation material due to its inert, non-hygroscopic and shock resistant nature. Popular applications are gamma-ray detection, health physics systems and applications where mechanical shock to the scintillation material may be an issue.
| Density [g/cm³] | 3.18 |
| Melting point [K] | 1691 |
| Thermal expansion coefficient [K-¹] | 19.5 x 10-⁶ |
| Cleavage plane | <111> |
| Hardness (Mho) | 4 |
| Hygroscopic | No |
| Wavelength of emission maximum [nm] | 435 |
| Lower wavelength cutoff [nm] | 395 |
| Refractive index at emission maximum | 1.47 |
| Primary decay time [µs] | 940 |
| Light yield [photons/keV γ] | 19 |
| Photoelectron yield [% of NaI(Tl)] (y rays) | 50 |