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Pair production

  1. Sep 16, 2005 #1
    In pair production, an nucleus is needed to take away some momentum from the photon so momentum conservation is respected. correct?
  2. jcsd
  3. Sep 16, 2005 #2


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    Staff: Mentor

    Right. Or at least a heavy charged particle. It's just that a nucleus is the most common such beast.
  4. Sep 16, 2005 #3


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    Science Advisor

    There is an alternative way for pair production to take place - it happened right after the big bang. Specifically, a pair of photons can interact to get a particle-antiparticle pair.
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