Alpha Particles Interaction with Plastic Film
Stage, camera holder, source holder, polonium-210, plastic film (Saran wrap), Minipix-EDU
- Launch the Pixet Basic software and modify settings to the following:
- Min Level: 0
- Max Level: 100
- Measurement Mode: Tracking
- Frames: 1
- Exposure: 1 s
- Sum: uncheck
- Color Map: Hot
- Mount the MiniPix EDU camera and polonium on the stage.
- Keep the camera and the source as close as possible and click on the play button.
- Next, wrap the polonium disc in plastic film and collect the data again, as shown in figure 1.
Figure 1. The polonium disc wrapped in a single layer of plastic film.
- Initially, we observe that the frame is full of alpha particle blobs as expected (Fig. 2).
Figure 2. The observed alpha particles without anything between the camera and source
- The size of alpha particle blobs decreases when the plastic film is blocking the path of alpha particles (Fig. 3).
Figure 3. The small-sized alpha particles blobs observed when a single layer of plastic film is blocking the path of alpha particles
- Ultimately, with 2 layers of foil, all the alpha particles are absorbed in the film and we do not observe any blobs.
- A single layer foil was neither thick nor dense enough to stop the alpha radiation.
- Although, two layers of foil absorbed all the energy of the alpha particles. But again we observe that the gamma photons were easily able to penetrate through.