7D10.10-Geiger counter & samples

7d1010geigner counter and samples

Video: Watch this demo

Instructor’s video

Description: This demonstration uses a Geiger counter to show the presence of radioactive samples.
A lead plate can be used to show the effectiveness of lead at blocking certain radioactive particles.
Inside the wooden box is a uranium goblet shown in the second picture.

Equipment:

  • Geiger counter
  • Lead plate, plastic plate, foam plate
  • Compass, alpha source, uranium goblet

Setup Procedure:

  1. Test to make sure the geiger counter is working. Set it to an appropriate volume and sensitivity level.
  2. When the professor is done, return them to the lock box.

Demonstration Procedure:

  1. Turn on the geiger counter.
  2. Explain that it sometimes clicks when not around sources, due to cosmic rays.
  3. Use the probe to measure different sources and note the intensitiy levels.
  4. You may use different materials to sheild the probe from different sources, such as a piece of paper, a sheet of lead, some foam, etc.
  5. Always keep an eye on these items. Students find radioactive samples very interesting, and tend to steal them more often than other things.

Note: Students find radioactive samples very interesting, and tend to steal them more often then other things.
Keep an eye on these samples in the presence of students.

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