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Pair production

  1. Aug 19, 2005 #1
    Is there a short answer why pair production can not happen in empty space, but that photons must interact with an external field?

    thanks and a nice weekend

    oh, just saw someone asked the same question in the nuclei section today and answers already there
     
    Last edited: Aug 19, 2005
  2. jcsd
  3. Aug 19, 2005 #2
    Listen, Go and look for "pair creation" in "Nuclei and particles". The answer is given there.
     
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