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Degree of forbiddenness

  1. May 5, 2005 #1
    How do we calculate degree of forbiddenness? Can someone do an example to show me?
  2. jcsd
  3. May 7, 2005 #2
    Forbiddenness, or rather forbiddance is the state of being forbidden and does not come in degrees - it is an "absolute" like "only". Cheers, Jim
  4. May 8, 2005 #3

    Meir Achuz

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    Used in nuclear physics "first forbidden", "second forbidden".etc. refers to by how much a selection rule is broken. Usually if the selection rule is delta L=1, then first forbidden means a transition where delta L=2 or 0, and third is where delta L=3.
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