Calcium fluoride doped with europium (CaF₂:Eu) is a well-established inorganic scintillation crystal prized for its chemical stability, non-hygroscopic nature, and mechanical robustness. Under ionizing radiation, it exhibits intense blue luminescence centered around 420–435 nm, originating from the 5d–4f transition of Eu²⁺ ions, with a high light yield of approximately 19,000 photons/MeV and a fast decay time near 0....
Calcium fluoride doped with europium (CaF₂:Eu) is a well-established inorganic scintillation crystal prized for its chemical stability, non-hygroscopic nature, and mechanical robustness. Under ionizing radiation, it exhibits intense blue luminescence centered around 420–435 nm, originating from the 5d–4f transition of Eu²⁺ ions, with a high light yield of approximately 19,000 photons/MeV and a fast decay time near 0.94 μs. Its low effective atomic number and minimal backscattering make it particularly suitable for beta-particle detection, low-energy gamma-ray spectroscopy, and specialized applications such as tritium monitoring and dark matter searches.
OST Photonics supplies high-quality CaF₂(Eu) crystals in various dimensions and specifications upon request, ensuring a precise match for your specific application.
Low-level Tritium Detection
Compton Camera Scattering Plane
Astrophysics Dark Matter Search
D-D Neutron Active Interrogation
Environmental Radiation Monitoring
High Light Yield
Low Material Density
Excellent Environmental Stability
Low Effective Atomic Number
Pulse Shape Discrimination Capability
Maximum Size: ɸ80mm x 120mm
Available items: monolithic crystal
Density [g/cm3] | 3.18 |
Melting point [K] | 1691 |
Thermal expansion coefficient [C-1] | 19.5 x 10-6 |
Cleavage plane | <111> |
Hardness (Mho) | 4 |
Hygroscopic | no |
Wavelength of emission max. [nm] | 435 |
Lower wavelength cutoff [nm] | 395 |
Refractive index @ emission max | 1.47 |
Primary decay time [ns] | 940 |
Light yield [photons/keVγ] | 19 |
Photoelectron yield [% of NaI(Tl)] (for γ-rays) | 50 |
The following specifications are listed on our original catalogue. Custom dimensions, orientations and surface finishes are produced to your drawing.
Send us your dimensions, orientation, surface finish and quantity. Our engineers reply with a technical proposal and price.
