7D10.25 - Radioactivity of Dust - Radon

Code Number:
Demo Title:
Radioactivity of Dust - Radon
Natural Radioactivity
Area of Study:
Modern Physics
Balloons, Cats Fur, Nucleus Counter

Blow up the balloon and rub it with the Cat's fur so that it has an electrostatic charge.  Let is set in the room for at least an hour, but over night would probably be better.  Pop the balloon and place it in the counter.  You should be able to get counts that are about 3 to 4 times background.  NOTE:  If the balloon is placed in the sub-basement for several hours you should be able to increase the total count.

  • Matthew Geske, Crystal Murray-Weston, Graham Lelack, "Measuring Atmospheric Radon Levels Using a Cloud Chamber", TPT, Vol. 60, #6, Sept. 2022, p. 498.
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  • S-252: "Accumulating Radon on Balloon", DICK and RAE Physics Demo Notebook.
  • W. Bolton, The Half-Life of a Radon Isotope(86Rn^220) (1)", Book 3 - Atomic Physics, Physics Experiments and Projects, 1968, p. 71-72.
  • W. Bolton, The Half-Life of a Radon Isotope(86Rn^220) (2)", Book 3 - Atomic Physics, Physics Experiments and Projects, 1968, p. 73-74.

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