: In essence, all radioactivity is the emission of a particle of some sort or another. Any photons or electromagnetic waves (depending on how you want to think about it) is the result of an antiparticle annihilating. | : In essence, all radioactivity is the emission of a particle of some sort or another. Any photons or electromagnetic waves (depending on how you want to think about it) is the result of an antiparticle annihilating. |