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Interactions in shielding
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Gamma-ray photons from the source will undergo interactions with the surroundings of the detector, i.e. the:
  • the shielding;
  • the cryostat;
  • the detector cap; and 
  • the source mount etc.,

These unavoidable interactions can influence the shape of the spectrum recorded by the detector.

Have a go Use this animation to illustrate the different sources of secondary radiation from the lead shielding surrounding the detector. 

 

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