Spin

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Spin

• PHY 361
• 2008-03-24

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Outline

• introduction to spin
• analogy with earth orbital and spin angular
  momentum
• quantum orbital (l,ml) and spin (s,ms)
  angular momentum
• magnetic moment
• relation to spin Bohr magneton ?B,
  gyromagnetic ratio gl, gs
• dynamics in magnetic fields
• interaction energy, precession, deflection force
• example spinning top
• SternGerlach experiment
• total angular momentum (J,m)
• triangle relationship
• complete hydrogen wave function
• spectroscopic notation
• spinorbit coupling fine structure

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Earthelectron analogy
Its all about spin!

• spin always has the same magnitude
• integer or half-integer
• the electron has nothing to spin(it is a point
  particle)

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Magnetic moment and precession
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SternGerlach Experiment
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SternGerlach Experiment
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Coupling of angular momentum example
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Coupling of angular momentum
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Spin-orbit interaction fine structure
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Fine structure J splitting
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Periodic Table

• 1s2 2s2 2p6 3s2 3p6 4s2 3d10 4p6 5s2 4d10
  5p6 6s2 4f14 5d10 6p6 7s2 5f14 6d10 7p6