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Excitation to optically forbidden state

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  1. Sep 19, 2014 #1
    Can somebody please explain how electron impact can cause optically forbidden transitions in atoms and molecules ?
     
  2. jcsd
  3. Sep 27, 2014 #2

    DrClaude

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    Staff: Mentor

    I'm not sure how to answer you, as I don't understand what you find surprising here.

    Do you understand how the rules for electric-dipole allowed and forbidden transitions are obtained?
     
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