30. Assume that an electron-positron pair is formed by a photon having the threshold en- ergy...
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30. Assume that an electron-positron pair is formed by a photon having the threshold en- ergy for the process. (a) Calculate the momentum transferred to the nucleus in the process. (b) Assume the nucleus to be that of a lead atom and compute the kinetic energy of the recoil nucleus. Are we justified in neglecting this energy compared to the threshold energy assumed above? 30. Assume that an electron-positron pair is formed by a photon having the threshold en- ergy for the process. (a) Calculate the momentum transferred to the nucleus in the process. (b) Assume the nucleus to be that of a lead atom and compute the kinetic energy of the recoil nucleus. Are we justified in neglecting this energy compared to the threshold energy assumed above?
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