The Interaction of Atoms and Radiation

The interaction of an atom and radiation has three processes to analyze. 1) Spontaneous Emission where the classical oscillating charge will radiate spontaneously and an atom can spontaneous transit from an excited higher energy state to a state of lower energy by emitting a photon called quantum of the electromagnetic field. 2) In second state the atom can absorb a photon a beam of radiation and making a move from lower energy state to higher energy sate where the intensity of the applied field is proportional to the rate of absorption. 3) In Stimulated Emission, under the influence of an applied radiation field atoms can also emit photons.

  • Time dependence of the wave function
  • Interaction of an atom with a sinusoidal electromagnetic field
  • A two state system – the rotating wave approximation
  • Absorption and emission radiation
  • Spontaneous emission
  • Angular momentum selection rules
  • Selection rules for hydrogen atoms
  • Transitions in multi-electron atoms
  • Physics model of the field-atom interaction
  • States of quantized radiation field
  • Radiative damping
  • Interaction with monochromatic radiation

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