Annihilate this. The anti-proton is a type of antimatter and is the antimatter “cousin” of the proton; the two particles have the same rest mass. It is possible for a proton and an anti-proton to annihilate each other, producing pure energy in the form of electromagnetic radiation (Chapter 31). How much energy is released when a proton and an anti-proton annihilate each other? Assume the two particles are at rest just prior to the annihilation.