BaF2
Introduction:
Barium fluoride (BaF2 ) crystal has been commonly used as a laser window material due to its broad transmission spectrum (190-1200nm). It is characterized by high transmittance, slight
hygroscopicity and little dependence of refractive index on the temperature. The emission of BaF2 consists of a fast component with =0.6ns at 180-240nm and a slow one with 620ns at 310nm.
Its luminescence intensity is independent on temperature. It is regarded as the fastest scintillators so far. Since the fast component can be used to measure time precisely, and obtain good time
resolution, it has been pursued as a promising scintillator in the research of positron annihilation. It shows excellent radiation hardness up to 106 rad or even more. All these properties make barium
fluoride crystals favorable for the applications of nuclear detection involving very high counting rates and severe radiation.
We can also provide the Yttrium doped BaF2 crystal, the scintillation performance is obviously improved, it can greatly inhibit the slow luminescence component of the crystal and has excellent fast/slow
scintillation ratio. This crystal can be coupled with a PMT to produce a scintillation detector, it is suitable for high time radiation fields such as high energy physics, medical and ultra-high speed imaging.
Properties:
Density(g/cm3) | 4.88 |
Radiation length(cm) | 2.03 |
Melting Point (°C) | 1280 |
Peak emission (nm) | 220/310 |
Decay Constant (ns) | 0.8/630 |
Hardness(Mohs) | 3 |
Refractive Index | 1.56 |
Hygroscopicity | Slight |
Cleavage | 111 |
BaF2 crystal with Yttrium(Y3+) doped performance comparison:
