Uses of Radiation
Uses of Alpha - Smoke Detectors
- A weak source of alpha radiation is placed in the detector, close to two electrodes.
- The source causes ionisation, and a current flows between the electrodes.
- If there is a fire then the smoke will absorb the radiation - so the current stops and the alarm sounds.
Uses of Beta and Gamma - Traces in Medicine
- Certain radioactive can be injected into people and their progress around the body can be followed using an external detector. A computer converts the reading into a display showing where the strongest…