RADIATION

Description

P2 Radiation - Alpha/Beta/Gamma
amybellingham
Mind Map by amybellingham, updated more than 1 year ago
amybellingham
Created by amybellingham over 8 years ago
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Resource summary

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