Multiple choice

Why is it suitable to use a beta radiation source, rather than an alpha or gamma source, to monitor the thickness of the sheet?

  1. Gamma radiation affects the properties of the sheet.

  2. The gamma signal changes in a regular way with thickness changes.

  3. The beta signal changes in a regular way with thickness changes.

  4. Too little alpha radiation is absorbed on the surface to check the thickness.

  5. One can easily protect workers from the effects of beta radiation.
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Beta radiation has moderate penetration power (alpha low, gamma high) and more is stopped the thicker the material. The electronic signal from the detector varies in a regular way depending on the thickness.

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