ionising radiation mind map

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  • Created by: Ntando
  • Created on: 08-03-16 19:36
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  • Alpha
    • ion sing radiation
      • Beta
        • 1.stopped by thin metal
        • 2. moderately ionising
          • push an electron out of orbit because of its negative charge
        • 3. light and fast
        • its an electron
          • every beta particle emitted a neutron turns to a proton in the nucleus
            • beta -
              • happens when there are to many neutron
        • light and fast
        • beta +
          • just like electrons but positively charged
            • same properties known as positrons
              • protons turn into neutrons in the nucleus
          • happens when there are to many protons
            • the proton nuber decreases by one and the nucleon number stays the same
      • gamma rays
        • elctromagnetic radiation
        • weakly ionizing
          • gives electrons energy to enough energy to escape orbit
        • stopped by thick lead
        • no, mass very fast
        • after a and B decay nucleus the nucleus often has excess energy
          • gamma always goes with alpha or beta decay
      • what is it?
        • isotopes are atoms with the smae number of protons but different neutrons
          • when an atom gains or loes and electron it turns into an ion and alpha gamma and beta make this happen
      • neutron radiation
        • neutrons are more penetrating than alpha and beta sometimes gamma
        • absorbing a neutron can make a nucleus radioactivity
          • the nuclei emits ion sing radiation
            • thats why sometimes called indirectly ionsing
        • best absorbed by light nuclei like hydrogen and hydrogen rich martiels like water  polythene
          • normally makes gamma radition
    • a  helium nuclei
      • two protons two neutrons
    • slow and heavy
    • strong ionizing
      • have a strong postive charge  which means it can pull an elctron away from its ion
    • stopped by paper

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