(1) So the normally stable proton can decay into a neutron, a positron , and a neutrino if continuously fed enough energy through constant, extreme acceleration.(2) Electrons, positrons , and photons can be separated and isolated at macroscopic distances.(3) The full scattering amplitude is the sum of all contributions from all possible loops of photons, electrons, positrons , and other available particles.(4) The term accelerators most commonly refers to particle accelerators, devices for increasing the velocity of subatomic particles such as protons, electrons, and positrons .(5) The decaying atoms emit positrons , which encounter electrons and are annihilated, releasing pairs of gamma rays.
