Stellar fusion involves protons becoming neutrons, which means ejecting a positron. Positrons annihilate electrons. This must deliver some energy in stellar fusion. But how much of the energy from stellar fusion comes from this positron-electron annhilation?

  • $\begingroup$ The relevant wikipedia article states that the position-electron annihilation produces 1.02 MeV of energy. $\endgroup$ – lemon May 6 '16 at 10:45
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    $\begingroup$ Wich kind of fusion are you referring to? $\endgroup$ – descheleschilder May 6 '16 at 11:15
  • $\begingroup$ @lemon that's not the question at hand. $\endgroup$ – Carl Witthoft May 6 '16 at 11:34
  • $\begingroup$ @CarlWitthoft Can you clarify precisely what the question is? $\endgroup$ – lemon May 6 '16 at 11:35
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    $\begingroup$ @lemon. I'm hoping English isn't your native language or I'll really be sad. The OP clearly asked for the fraction of all released energy attributable to proton decay. $\endgroup$ – Carl Witthoft May 6 '16 at 11:37

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