Particle physics

• What is conserved in strong intetaction?

  Everything
• What is conserved in weak interaction?

  Everything apart from strangeness
• What is an alpha particle?

  A helium nucleus
• What is the equation for Beta minus decay?

  n —> p + B- + Ve-bar
• What is the equation for Beta plus decay?

  p —> n + B+ + Ve
• What is gamma radiation?

  High energy photons
• Is strangeness conserved in Beta decay?

  No
• What do nucleons exchange in the strong interaction?

  Exchange pions
• What range is attractive in the strong interaction?

  < 3 fm
• What range is repulsive in the strong interaction?

  < 0.5 fm
• What does A stand for in the AXZ notation?

  Nucleon number
• What does Z stand for in the AXZ notation?

  Proton number
• What is specific charge?

  Charge/Mass
• What is the laser equation?

  P = nhf and E = nP
• What is anihillation?

  The process by which rest mass is converted into energy
• What occurs in anihillation?

  • Collision of a particle and its antiparticle
  • annihilate to create two gamma photons
  • Travelling in opposite directions to conserve momentum
• What occurs in pair production?

  • Collision of two gamma photons
  • produce a particle and an antiparticle
  • Travelling in opposite directions to conserve momentum