Demonstration of Strontium Activity
Equipment: Stage, camera holder, source holder, strontium-90, Minipix-EDU
- Launch the Pixet Basic software and modify settings to the following:
- Min Level: 0
- Max Level: 50
- Measurement Mode: Tracking
- Frames: 100
- Exposure: 1 s
- Sum: uncheck
- Color Map: Hot
- Mount the MiniPix EDU camera and strontium on the stage.
- Keep the camera and the source approximately 2 cm away and click on the play button.
- We observe tracks of worm-like tracks which is a result of beta radiation (Fig. 1).
Figure 1: The beta particles during 100 seconds of exposure of strontium-90
- Sometimes we might also observe alpha and/or gamma particles from background radiation.
- The beta particles usually have an energy range from a few keV to hundreds of keV.
- The dots in the result are sometimes the low energy beta particles which do not have enough energy to interact with electrons of silicon and form a long track.