2MHz Scintillator IR Optics BaF2 Fluoride Crystal
Brand Name:CRYLINK
Certification:Iso9001
Model Number:CRYLINK- CaB2 Fluoride Crystal
Minimum Order Quantity:1 Pieces
Delivery Time:3-4 weeks
Payment Terms:T/T
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Shanghai Shanghai China
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No.200, Zgaoxian Road, Jiading Zone, Shanghai, China
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CaB2 Fluoride Crystal
Description
Barium fluoride (BaF2) is a general-purpose optical window material
that offers a wide range of transparency, from the ultraviolet to
the long-wave infrared, with low reflectance loss and low
dispersion. BaF2 single crystal is an intensively studied
scintillator for the detection of gamma radiation due to its
relatively high stopping power, radiation hardness and extremely
fast response. BaF2 possesses the fast cross-luminescence component
at 195 and 220 nm with a lifetime of several hundred picoseconds.
However, this component coexists with slow one at 310 nm related to
the self-trapped exciton (STE). BaF2 is a broad band gap crystal
with Eg=10:9 eV. It is currently regarded as the fastest inorganic
scintillator which has cross-luminescence bands peaked at 195 and
220 nm and a broad band peaking at about 300 nm due to self-trapped
excitons. Much attention has been focused on the luminescent
properties of rare earth ions activated BaF2.
Features
- Excellent transmission from 150nm to 12um
- Chemically stable
- Low reflectance loss and low dispersion
- High stopping power, radiation hardness and extremely fast response
- Broad band gap
- Susceptible to thermal shock
- Possesses the fast cross-luminescence component at 195 and 220 nm with a lifetime of several hundred picoseconds
Applications
- Window and focusing mirror for deep uv and excimer lasers
- Scintillator,IR optics
- Inorganic scintillator for subnanosecond timing
Parameter
Material and Specifications
| Orientation | [100] or [111] < ±0.5° |
| Angle Tolerance | < 0.5° |
| Parallelism | <20〞 |
| Perpendicularity | 5ˊ |
| Surface Quality | 10-5 (MIL-O-13830A) |
| Wavefront Distortion | <λ/4@633 nm |
| Surface Flatness | <λ/8 @633 nm |
| Clear Aperture | >90% |
| Thickness/Diameter Tolerance | ±0.05 mm |
Physical and Chemical Properties
| Crystal System | Isometric |
| Habit | Cubic |
| Space Group | Fm3m(Oh5 |
| Lattice Constants | 6.2001 Å |
| Specific mass | 4.886 g/cm3 |
| Melting Point | 1354°C |
| Flexure Strength (MPa) | 27 |
| Tenacity | Brittle |
| Thermal Conductivity /(W·cm-1·K-1@25°C) | 0.07 |
| Specific Heat/ (J·g-1·K-1) | 1.003 |
| Thermal Expansion /(10-6·K-1@25°C ) | 13.7 |
| Hardness (kg/mm2@Knoop) | 78 |
| Young`s Modulus /GPa | 138.5 |
| Fracture | {111} and {100} |
Optical characteristics
| Transmission Range | 0.15 … 12 µm |
| Reflective Loss | 6 … 16%@0.2 … 10 µm |
| Thermo-optic coefficient(10-6·K-1@30…90°C ) | -18.8 |
| Poisson Ratio | 0.31 |
| Dielectric Constant | 7.33@f=2MHz |
Index of Refraction
| λ(μm) | n | λ(μm) | n | λ(μm) | n |
| 0.2 | 1.5573 | 4 | 1.4558 | 9 | 1.4144 |
| 0.5 | 1.4779 | 5 | 1.4511 | 10 | 1.4011 |
| 1 | 1.4686 | 6 | 1.4441 | 11 | 1.3865 |
| 2 | 14647 | 7 | 1.4357 | 12 | 1.3696 |
| 3 | 1.4612 | 8 | 1.4258 | 12.5 | 1.3585 |
| 15 | 1.305 |
Spectrum
2MHz Scintillator IR Optics BaF2 Fluoride Crystal
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