• Created by: abic1
  • Created on: 03-05-16 18:40
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  • ionisation
    • when a photon has enough energy to remove an electron
    • the ionised atoms can start chemical reactions
    • only radiation with high photon energy can ionise a cell
    • gamma, xray and ultraviolet can cause ionisation
    • radioactive materials emit ionising gamma radiation all the time
    • ionisation of the body cells is dangerous
    • ionising radiation can cause cells to mutate
    • mutations can cause the cells to keep on dividing and can cause cancer
    • high does of radiation can kill cells altogether
    • Uv radiation ionises cells and can cause sunburn and skin cancer
    • increased exposure causes more damage
    • physical barriers such as clothes and suncream protect from UV radiation
    • lead shields absorb xrays
    • xrays pass through flesh but are absorbed by bone


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