RADIATION
- Created by: Tom Bowen
- Created on: 27-05-14 11:50
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- 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
- ALPHA
- short wavelength. high energy. atoms become charged removing electrons=mutations/cancer)
- emission of EM specturm and energy given out by radioactive materials
- 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
- made up of protons and neutrons and electrons
- Isotpes
- all atoms of the same element have the same number of PROTONS. if different number of NEUTRONS
- atoms have a small nucleus
- When/how does it occur?
- nucleus becomes unstable - too mny NEUTRONS
- emit radiation
- nucleus becomes unstable - too mny NEUTRONS
- 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
- the time it takes for half of the atoms to decay.
- 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
- Ionizing the molecules
- what is it?
- Examples
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