• • Welcome
  • Preview
  • Exhibit team
  • Meet the team
  • Acknowledgements
  • Stand panels
  • Booklet
  • Postcards
  • Stickers
  • Photo gallery
  • Video clips
  • Credits
  • Contact
• • Building blocks
  • Into the atom
  • Feynman diagrams
  • Penguin diagrams
• • Particle sources
  • Radioactive emission
  • Cosmic rays
  • Particle accelerators
  • Detection techniques
  • Cloud chamber
  • Bubble chamber
  • Spark chamber
• • Collider
  • Experiments
  • Physics studies
  • Data analysis
  • Live status
  • Live interactions
• • Games
  • Puzzles
  • Feynman zoo
  • Quizzes

Particle sources

Subatomic particles are locked together in everyday objects, but unbound particles are produced in radioactive emission, and in cosmic-ray showers. These naturally occurring particles were used in the earliest studies of subatomic physics.