Matter and antimatter

Matter and antimatter

1. Antimatter - antiparticles that each have the same rest mass and, if charged, have equal and opposite charge to the corresponding particle

2. Annihilation

   • When matter and antimatter particles meet, they destroy each other and radiation is released
   • E(min) = E(0)
     • E(min) - minimum energy of photon produced
     • E(0) - rest energy of particle type annihilated in MeV

3. Pair production

   • When a gamma photon changes into a particle and an antiparticle
   • E(min) = 2E(0)
     • E(min) - minimum energy needed in MeV
     • E(0) - rest energy of particle type produced in MeV

4. When Einstein said E=mc^2 he meant that energy = matter

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