Part A How much total kinetic energy will an electron-positron pair have if produced by a...
Part A How much total kinetic energy will an electron-positron pair have if produced by a 3.69 MeV photon? Express your answer using three significant figures.
Homework Answers
Any energy beyond the minimum needed to produce the electron and
positron(rest mass energy) goes into kinetic energy
i.e. Ephoton = 2me c2 +
K.E.
Mass of electron = mass of positron = me = 9.11 ×
10–31 kg or 0.51 MeV/c2
From above equation
3.69 = 2 x 0.51 + K.E.
K.E. = 3.69MeV - 1.02MeV = 2.67 MeV.
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