P2 6.4 More About Alpha, Beta and Gamma Radiation
- Created by: kayleigh_p
- Created on: 09-04-15 20:28
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- More about alpha, beta and gamma radiation
- Ionisation
- When electrons are knocked off of nuclear radiation
- Happens when radiation passes through a material and collides into it
- Can damage a living cell
- Alpha particles
- Large, meaning they have many collisions with atoms
- Strongly ionising
- Do not penetrate far into a material because of collisions
- Can be stopped by thin paper, human skin or a few centimetres of air
- Positively charged
- Deflected by electric and magnetic fields
- Beta particles
- Smaller and faster than alpha particles
- Less ionising than alpha particles
- Penetrate further than alpha particles
- Blocked my a few metes of air or a thin sheet of aluminium
- Negatively charged
- Deflected by electric and magnetic fields
- Gamma rays
- Electromagnetic waves
- Travel through far a material before colliding with an atom
- Weakly ionising
- Very penetrating
- Several centimetres of lead or metres of concrete are needed to absorb the radiation
- Not deflected by electric and magnetic fields
- Electromagnetic waves
- Ionisation
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