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  • Most researchers at the UW use beta emitters.
  • High energy beta emitters such as P-32 and Y-90 require shielding.
  • The best materials for shielding are low Z materials such as plexiglass or aluminum.
  • Lead or steel (high Z) will shield the beta particles but the betas interact with the materials to produce X-rays.
  • Low Z materials have more distance between molecules and less chance in interaction with beta particles.
  • This means less X-ray production and less possibility of personal exposure.

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