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Jemurray3
 2 years ago
Best ResponseYou've already chosen the best response.1What are the rest energies of protons and antiprotons?

Carl_Pham
 2 years ago
Best ResponseYou've already chosen the best response.0The proton has a rest mass of 938 MeV, so if all of the energy went into the photon, you'd have 2 x 938 = 1.876 GeV. Incidentally, that's not an Xray, that's a very energetic gamma ray.
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