P6- Radiation

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  • Created by: 11mbrady
  • Created on: 16-04-16 13:33

P6

TYPES OF RADIATION

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Alpha Radiation

ALPHA RADIATION

  • Alpha particles are relatively big and heavy
  • DONT PENETRATE far into materials
  • Released by HEAVY NUCLEI 
  • Alpha particle is a helium nucleus (2 protons/2 neutrons)
  • Mass of 4 and a charge of 2+
  • Alpha decay ALWAYS changes the element of the atom thats decaying (loses protons)
  • Blocked by paper//skin
  • (http://www.darvill.clara.net/nucrad/images/alpha42.jpg)
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Beta Radiation

BETA RADIATION

  • Move FAST and are QUITE SMALL
  • PENETRATE MODERATELY into materials
  • Released by nuclei that have TOO MANY NEUTRONS
  • Identical to electron (no mass, charge of -1)
  • Neutron in nucleus turns into a PROTON so element chnages in BETA DECAY
  • Blocked by thin aluminium//any metal
  • (http://ths.talawanda.org/~bramblen/classroom/Pictures/betaparticle.JPG)
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Gamma Radiation

GAMMA RADIATION

  • Its an ELECTROMAGNETIC WAVE
  • Happens when an alpha or beta particle needs to get rid of EXTRA ENERGY
  • No mass
  • PENETRATES A LONG WAY into materials without stopping
  • DOESNT CHANGE the elements becaue it's just energy
  • Blocked by thin lead//thick concrete
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