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Ce:BaF2 Scintillation Crystals

FEATURES

DESCRIPTION BaF2, the fastest known scintillator, is a very attractive material for γ-ray detection and light charged particles.The BaF2 doped with rare earth ions, such as the Ce3+ ion, can suppress the slow components. Ce:BaF2, a reasonably fast, efficient and rugged scintillator characterized by a reasonable stopping power, good matching refraction index and availability of large size crystals, was first proposed in 1977 as a substitute for BaF2, which it is also the most efficient of all the rare-earth-doped alkaline earth fluorides. BaF2’s conversion of light for ionising radiation is quite linear with energy. However, the integrated intensity of the fast component is low and the emission spectrum of BaF2 contains an exciton band with undesirably long decay time. This problem can be solved by the introduction of an activator, which transforms the exciton emission into the faster activator luminescence. Trivalent cerium has been became a natural choice for the activator, because the Ce3+ ion has a fairly short decay time. Ce:BaF2 scintillator is a well-known, reasonably fast and efficient scintillator characterized by a decent stopping power and availability of large size crystals. Bulk single crystalline Ce:BaF2 have been used as traditional scintillators for gamma ray detection.

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Non-hygroscopic Linear conversion of light Chemically stable Quite short decay time Fast time response Reasonable stopping power Good matching refraction index

APPLICATIONS γ-ray detection Light charged particles identification Charged particle detector Detectors for ionising radiation Optical amplifiers X-ray imaging Radiation scintillation

+86-21-69910952 / 69913696 No.200, Zhaoxian Road, Jiading District, Shanghai, China


Ce:BaF2 Scintillation Crystals PARAMETERS

SPECTRA

MATERIAL PROPERTIES Property

Value

Materials

Ce:BaF2

Density (g/cm3)

4.893

Melting point (℃)

1386

Hardness (Mohs)

3

Hygroscopicity

Slightly

Cleavage plane

<111>

Solubility (g/100gH2O)

0.17

Thermal expansion (C-1)

18.4*10-6

Thermal conductivity (W/mk)

11.72

SCINTILLATOR PROPERTIES Property

Value

Wavelength(Max. emission) (nm)

310

Wavelength range (nm)

170-460 nm

Decay time (ns)

630(slow);0.87/0.88(fast)

Light yield (photons/keV)

10(slow);1.9(fast)

Refractive index(Max. Emission)

1.49

Radiation length (cm)

2.026

Transmittance (%)

>90

Optical transmittance (um)

0.15-12.5

Reflection loss/surface (%)

6.8

Afterglow (%)

0.005

Lattice constant (nm)

0.6196

Photoelectron yield [% of NaI(TI)](for γ-rays)

20%(slow);4%(fast)

www.laser-crylink.com sales@laser-crylink.com

+86-21-69910952 / 69913696 No.200, Zhaoxian Road, Jiading District, Shanghai, China

Profile for Laser Crylink

Ce:BaF2 Scintillator Crystal— A reasonably fast and rugged scintillator  

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