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PWO - Lead Tungstate


Lead Tungstate - PWO PbWO is a highly effective gamma-ray absorber as a result  of its high density

and high Z. It is also very fast with a very short Radiation Length and Moliere Radius.


PWO scintillator crystal strengths:



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



Lead Tungstate - PWO scintillator crystals are useful in diverse applications such as:






Properties

Optical/Scintillation

Units

Value

Wavelength (Max. Emission)

nm

430, 520

Wavelength Range

nm

TBA

Decay Time

ns

6 and 30

Light Yield

photons/keV

TBA

Photoelectron Yield

% of NaI(Tl)

1

Radiation Length

cm

0.92

Optical Transmission

µm

TBA

Transmittance

%

TBA

Refractive Index


2.16

Reflection Loss/Surface

%

TBA

Neutron Capture Cross-section

barns

TBA

Properties

Mechanical

Units

Value

Density

g/cm³

8.28

Atomic Number (Effective)


73

Melting Point

ºK

1125

Thermal Expansion Coeff.

C⁻¹

10.0 x 10‾⁶

Crystal Structure


Tetra

Hardness

Mho

4

Hygroscopic


No

Solubility

g/100gH0

N/A

PWO Scintillation Crystals - Sizes


PWO Scintillation Crystal - Properties


Diameters:  Up to 50mm

Lengths:      Up to 200mm






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Further Reading / Publications (Click for links)


BGO - Wikipedia

BGO - Details - Refractive Index

BGO - PET Application

BGO - PET Application

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