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Energy-mass equivalence

  1. Apr 2, 2012 #1
    What defines what element results when energy is converted into matter? i.e. the protons/electrons/neutrons
     
  2. jcsd
  3. Apr 2, 2012 #2

    mathman

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    When energy (high energy gamma rays) is converted to matter, the usual process is pair production (particle plus anti-particle). Which product depends primarily on the amount of energy involved. The lowest energy possible is to produce an electron-positron pair, which requires 1.022 Mev.

    http://en.wikipedia.org/wiki/Pair_production
     
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