Advatech CaF2(Eu) Scintillation Crystals
CaF2(Eu) is a useful scintillator for detecting charged particles and soft gamma-rays up to several hundred keV. Additionally, in crystal form CaF2(Eu) is optically transparent over a wide range from 0.13 to 10µm and widely used to fabricate optical components.

CaF2(Eu) scintillator crystals are:
  • Good in terms of light emission
  • Relatively easily machined into various bespoke configurations
  • Chemically inert
  • Well suited to use within vacuums as it has a very low vapour pressure
  • Robust to both thermal and mechanical shock
  • Inherent low background radiation

CaF2(Eu) scintillator crystals - issues to be aware of:
  • Due to its low density and low Z has a low light yield when interacting with high energy gamma-rays
  • Has a sharp absorption band at 400nm which partly overlaps the scintillation emission band

Calcium Fluoride (Eu)- CaF2(Eu) - is a useful and proven scintillator for applications such as:
  • Medical physics applications
  • Phoswich configurations in conjunction with NaI(Tl)
  • Specialist applications where robust solutions are required
CaF2(Eu) Scintillation Crystals
- Properties -
CaF2(Eu) Mass Attenuation Coefficients
CaF2(Eu) Scintillator Emission Spectrum
CaF2(Eu) Mass Attenuation Coefficients
CaF2(Eu) Scintillator Emission Spectrum
CaF2(Eu) Scintillation Crystals
- Optical Properties -
Property Units Value
Wavelength (Max. Emission) nm 435
Wavelength Range nm 395 - 525
Decay Times ns 950
Light Yield photons/keV 30
Photoelectron Yield % of NaI(Tl) 50
Radiation Length cm 3.05
Optical Transmission µm 0.13 -10µm
Transmittance % TBA
Refractive Index 1.47 (@ 435nm)
Reflection Loss/Surface % 5.4
CaF2(Eu) Scintillation Crystals
- Mechanical Properties -
Property Units Value
Chemical Formula CaF2:Eu
Density g/cm³ 3.18
Atomic Number (Effective) 16.5
Melting Point ºK 1360
Linear Expansion Coeff. C⁻¹ 19.5 x 10‾⁶
Thermal Conductivity Wm⁻¹K⁻¹ 9.7
Crystal Structure Cubical
Hardness Mho 4
Hygroscopic No
Solubility g/100gH₂0 0.0017
CaF2(Eu) Scintillation Crystals
- Further Reading/Publications -
CaF2(Eu) Scintillation Crystals
- Sizes -
Diameters:
360mm max
Lengths:
150mm max.