RADIATION

HideShow resource information
  • Created by: Tom Bowen
  • Created on: 27-05-14 11:50
View mindmap
  • RADIATION
    • what is it?
      • emission of EM specturm and energy given out by radioactive materials
        • short wavelength. high energy. atoms become charged removing electrons=mutations/cancer)
          • ALPHA
            • same structure as helium
            • ionize air
            • stopped by paper
            • lose energy wuickly
          • BETA
            • high speed electron-emitted from nucleus
            • Smaller and lighter than alpha
            • quicker than alpha
            • ionize air, travel few metres
            • stopped by a mm of aluminium
          • GAMMA
            • short wavelength
            • move speed of light
            • least ionising
            • ver high energy
            • stopped by thick piece of lead
    • whats it made of?
      • atoms have a small nucleus
        • made up of protons and neutrons and electrons
          • Protons=positive
          • neutrons=neutral
          • electrons=negative
        • mass of atoms-nucleus
          • Protons=mass 1
          • Neutrons-mass 1
          • Electrons have NO mas-they are not in the nucleus
      • Isotpes
        • all atoms of the same element have the same number of PROTONS. if different number of NEUTRONS
    • When/how does it occur?
      • nucleus becomes unstable - too mny NEUTRONS
        • emit radiation
    • Background Radiation
      • rocks
      • cosmic rays(space)
      • Food
      • nucllear
      • waste
      • Half life
        • the time it takes for half of the atoms to decay.
          • easier to measure the time it takes for radiation to fall to half of original level
      • disposal
        • LOW LEVEL=at sea or land
        • INTERMEDIATE=stored in concrete/buried deep
        • HIGH LEVEL=vitrified/buried very deep
        • Problems
          • transporting
          • location
            • no earthquake activitty
          • monitured
    • Damage
      • Ionizing the molecules
        • sixze
        • Length
        • Type
      • precautions
        • wear a badge, records how exposed
        • controlled doess
          • kill cancer
          • kill micro-organisms
  • Examples

Comments

No comments have yet been made

Similar Physics resources:

See all Physics resources »See all Radiation resources »