Positrons: The Antiparticles of Electrons

  1. Positrons are the antimatter counterparts of electrons.
  2. They have the same mass as electrons but carry a positive charge.
  3. When a positron meets an electron, they annihilate, producing pure energy as gamma rays.
  4. Positrons were first predicted by Paul Dirac in 1928 and discovered in cosmic rays in 1932.
  5. They are naturally produced in certain types of radioactive decay and cosmic interactions.
  6. PET scans (Positron Emission Tomography) in hospitals rely on positrons to image the body.
  7. In particle accelerators, positrons are created and studied alongside electrons.
  8. Positrons confirm that antimatter is a real and observable part of physics.
  9. Their study helps explain why the universe is dominated by matter instead of antimatter.
  10. Though tiny, positrons hold the potential for future energy and propulsion technologies.