28. A y ray can produce an electron-positron pair in the neighborhood of an electron at...
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28. A y ray can produce an electron-positron pair in the neighborhood of an electron at rest as well as a nucleus. Show that in this case the threshold energy is 4moc2. (Hint: Do not ignore the recoil of the original electron, but assume that all three particles move off together.) 28. A y ray can produce an electron-positron pair in the neighborhood of an electron at rest as well as a nucleus. Show that in this case the threshold energy is 4moc2. (Hint: Do not ignore the recoil of the original electron, but assume that all three particles move off together.)
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The process of pair production occurs at high photon energy in which a pair of elementary particles ... View the full answer
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