4084509
Description
Mind Map by amybellingham, updated more than 1 year ago
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Created by amybellingham
about 9 years ago
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RADIATION
- radioactive
- substances which give out radiation from the nuclei randomly
- substances which give out radiation from the nuclei randomly
- background radiation
- natural sources
- cosmic rays
- granite rock gives off gamma rays and radon gas
- cosmic rays
- artificial sources
- medical (CT scan/X-ray)
- nuclear power waste
- medical (CT scan/X-ray)
- natural sources
- ALPHA
- 2 neutrons + 2 protons
- not very penetrating
- blocked by 5cm air
- blocked by 5cm air
- not very ionising
- positive charge
- 2 neutrons + 2 protons
- BETA
- high energy electrons
- emitted from unstable nuclei
- made when neutron in nucleus splits
- to make proton and electron
- to make proton and electron
- made when neutron in nucleus splits
- emitted from unstable nuclei
- negative charge
- medium penetration
- stopped by paper/thin aluminium/few metres air
- stopped by paper/thin aluminium/few metres air
- high energy electrons
- GAMMA
- electromagnetic waves
- high frequency/short wavelength
- most penetrating
- only stopped by many cm's lead or many metres concrete
- only stopped by many cm's lead or many metres concrete
- electromagnetic waves
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