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Topic: spin selection rule  (Read 2566 times)

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Offline chrismariesan

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spin selection rule
« on: April 28, 2008, 01:48:46 PM »
can someone explain the spin selection rule and maybe an example of a spin forbidden and spin allowed transfer.
For example

  i  i  i
   i! i!


  -- --
 i!  i!  i!



given these two cases, would one be forbidden and one be allowed?? plz explain why
thanks!!

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