Video: Watch this demo
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.
- Geiger counter
- Lead plate, plastic plate, foam plate
- Compass, alpha source, uranium goblet
- Test to make sure the geiger counter is working. Set it to an appropriate volume and sensitivity level.
- When the professor is done, return them to the lock box.
- Turn on the geiger counter.
- Explain that it sometimes clicks when not around sources, due to cosmic rays.
- Use the probe to measure different sources and note the intensitiy levels.
- 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.
- 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.