NBWO - Scintillator Crystal

NBWO Scintillation Crystals

Sodium Bismuth Tungstate - NBWO - NaBi(WO₄)₂ is a relatively new scintillator material with a high density, high radiation hardness and optical qualities.

NBWO scintillator crystals strengths:

  • High stopping power due to a high density (7.57 g/cm³) and high Effective Z (74)
  • Fast (Decay Constant - 20ns)
  • Can be easily machined into various shapes and geometries

NBWO scintillator crystals have the following issues which should be noted:

  • TBA

Sodium Bismuth Tungstate - NBWO - scintillator crystals are useful in diverse applications such as:

  • Used as a Cherenkov Radiator
  • Specialist applications in high energy, nuclear, space and medical physics

NBWO Scintillation Crystals - Optical Properties

Property Units Value
Wavelength (Max. Emission) nm 540
Wavelength Range nm TBA
Decay Times ns 20
Light Yield photons/keV TBA
Photoelectron Yield % of NaI(Tl) TBA
Radiation Length cm 0.98
Optical Transmission µm TBA
Transmittance % TBA
Refractive Index 2.15@520nm
Reflection Loss/Surface % TBA
Neutron Capture Cross-section barns TBA

NBWO Scintillation Crystals - Mechanical Properties

Property Units Value
Chemical Formula NaBi(WO₄)₂
Density g/cm³ 7.57
Atomic Number (Effective) 74
Melting Point ºC 935
Thermal Expansion Coeff. C⁻¹ TBA x 10⁻⁶
Cleavage Plane TBA
Hardness Mho 6
Hygroscopic No
Solubility g/100gH₂0 N/A

Further Reading/Publications

Sizes

Property Value
Diameters 50 mm max.
Lengths TBA max.

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