The Decay Path is offered as a supplementary section to the Particle Adventure. This section explains the concepts of atomic and particle decay.

• Introduction: The history of studying radioactivity
• Issues concerning atomic decay
  • Quantum Mechanics
  • Half Life
  • Missing Mass
• Fundamental Particle Decays
  • Weak vs. Strong
  • Annihilations
• Examples of Decays
  • Neutron decay
  • Electron/Positron annihilation
  • Proton/Antiproton annihilation yields the top quark
  • Charm/Anti-charm annihilation
  • Bubble-Chamber Photograph