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BaF2 crystals or Barium Fluoride crystals, with their extremely broad transmission range from the deep UV to LWIR spectrum, are prevalent for Infrared applications requiring additional transmission in the Ultraviolet region. BaF2 crystals windows are excellent when being used for IR spectroscopes and as viewport windows for thermal imaging inspection in electric power facilities and petroleum industries. A low refractive index of 1.48 implies BaF2 windows have high transmission rates without anti-reflection coating.

BaF2 barium fluoride crystal is the scintillation crystal with the fastest decay time found so far, it has a fast component with a scintillation decay time of 0.9ns and a peak emission wavelength of 220nm. BaF2 scintillator has a wide application prospect in the fields of high energy physics, nuclear physics and nuclear medicine.