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| NaBi(WO4)2 - Sodium-bismuth tungstate |
 Sodium-bismuth tungstate (NaBi(WO4)2 or NBWO) is a scintillator material possessing very high optical quality, high density and radiation hardness. Due to these properties NBWO crystals are widely used in quantum electronics, acousto-optics and high-energy physics, in particular, in Cherenkov detecting and solid state Raman laser shifting.
NaBi(WO4)2 is grown from the melt by Czochralski method.
If specific qualities are required NBWO can be doped with In or other elements. |
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| Structure | Tetragonal scheelite-like (a=5.30, c=11.58 angstrom) |
| Melting point | 935 °C |
| Density: | 7.5 g/ cm3 |
| Wavelength of max. emission | 520 nm (X-ray excitation)
495 nm (optical excitation at 77 K) |
| Refractive index at emission maximum | 2.15 |
| Radiation hardness | 107 rad |
| Max. crystal diameter | 50 mm |
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| NaBi(WO4)2 ingots and wafers |
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| Diameter/Width | 50 mm |
| Thickness/length | 0.1-20 mm |
| Surface quality | As-grown, 80/50, 60/40, 40/20 per MIL-0-13830 |
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| *The optimal and most cost-effective items are those with the diameter of 30-38 mm and the thickness of 1-2 mm |
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