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Understanding Quantum Selection Rules in Atomic Spectroscopy

Learn about the selection rules governing electric dipole transitions, including ΔL=±1 and ΔS=0, and the role of magnetic dipole transitions. Explore the intensity ratio of magnetic dipole to electric dipole transitions and its connection to the fine-structure constant α. Delve into Eddington's electric quadrupole transitions and the significance of ΔJ=±2.

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Understanding Quantum Selection Rules in Atomic Spectroscopy

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  1. Selection Rules Electric Dipole

  2. Selection Rules Electric Dipole L = 1 S = 0

  3. Selection Rules Electric Dipole L = 1 S = 0 S  S T  T S  T

  4. Selection Rules Electric Dipole L = 1 S = 0 S  S T  T S  T Magnetic Dipole

  5. Selection Rules Electric Dipole L = 1 S = 0 S  S T  T S  T Magnetic Dipole S = 1 S  T

  6. Selection Rules Electric Dipole L = 1 S = 0 S  S T  T S  T Magnetic Dipole S = 1 S  T Intensity - Magnetic Dipole / Electric Dipole

  7. Selection Rules Electric Dipole L = 1 S = 0 S  S T  T S  T Magnetic Dipole S = 1 S  T Intensity - Magnetic Dipole / Electric Dipole = 1/2 = 1/137 2 = 5.327x 10-5

  8. Selection Rules Electric Dipole L = 1 S = 0 S  S T  T S  T Magnetic Dipole S = 1 S  T Intensity - Magnetic Dipole / Electric Dipole = 1/2 = 1/137 2 = 5.327x 10-5   1/(102 + 62 + 1) (+ one for the pot) Eddington

  9. Selection Rules Electric Dipole L = 1 S = 0 S  S T  T S  T Magnetic Dipole S = 1 S  T Intensity - Magnetic Dipole / Electric Dipole = 1/2 = 1/137 2 = 5.327x 10-5   1/(102 + 62 + 1) (+ one for the pot) Eddington Electric Quadrupole 1/108

  10. Selection Rules Electric Dipole L = 1 S = 0 S  S T  T S  T Magnetic Dipole S = 1 S  T Intensity - Magnetic Dipole / Electric Dipole = 1/2 = 1/137 2 = 5.327x 10-5   1/(102 + 62 + 1) (+ one for the pot) Eddington Electric Quadrupole 1/108  J =  2

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