Flashcards in R6 - Uses of nuclear radiation Deck (5):
What makes beta and gamma suitable for medical tracers?
They penetrate the skin and other body tissues
How do medical traces work?
- A source that emits beta or gamma radiation is injected into the patient.
- The radiation penetrates the body tissue which can then be detected externally by a computer which converts the readings on he screen
Why does the radioactive source need to have a short half life?
So you can use less of the radioactive source but still get a reading on your detector
Why would you never use an alpha particle for medical tracers?
- It would be useless - alpha particles are stopped by body tissues so your would never detect it externally
- Also strongly ionising so can be really harmful if it gets inside of you