What is the aim of this practical lesson on penetration power of radiation?

To determine the penetration depths of alpha, beta and gamma radiation through various materials.

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What is the dependent variable in the penetration ability of radiation experiment?

Count rate

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What equipment is needed for the penetration of radiation experiment?

  1. Alpha, beta and gamma sources
  2. Radiation detector e.g. Geiger-Muller tube
  3. Absorbing materials e.g. paper, foil, lead
  4. Stopwatch

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How should the corrected count be calculated?

corrected count = count - background count

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What safety precautions should be taken when using radioactive sources?

  1. Never direct radiation sources at anyone.
  2. Handle sources with tongs.
  3. Minimise exposure time.

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